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2022-11-23: How To See Black Holes By Catching Neutrinos
- 12:01: ... can also look for neutrino Cherenkov radiation at radio wavelengths, which allows us to scan vast tracks of the Antarctic ...
- 12:21: One possibility is looking for radio-Cherenkov from the Moon.
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2022-11-16: Are there Undiscovered Elements Beyond The Periodic Table?
- 02:48: ... foil has been rendered radioactive in the accelerator, and Segre and his colleague Carlo Perrier were able ...
- 03:57: A more common term is radioactive, which we tend to associate with very heavy elements like uranium and plutonium.
- 15:25: The elements we will discover in the island of stability will be very heavy, initially hard to synthesize, and somewhat radioactive.
- 16:17: It’s mildly radioactive, extremely useful in medical imaging, and is the critical catalyst for low-temperature fusion.
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2022-10-12: The REAL Possibility of Mapping Alien Planets!
- 01:25: ... of the Milky Way. These were taken by bringing together radio signals from telescopes all across the planet, effectively giving us ...
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2022-06-30: Could We Decode Alien Physics?
- 00:00: ... the perhaps not too distant future, every radio telescope on Earth receives the same massive data dump from what can ...
- 14:09: ... so we’ve used your contribution to blast our own radio beam to hundreds of nearby stellar systems. It contains our own ...
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2022-03-23: Where Is The Center of The Universe?
- 18:20: Anarchy Antz asks if there’s any update on the radio signal from the direction of Proxima detected by the Breakthrough Listen project.
- 18:31: ... Radio astronomer Sofia Sheikh found around 60 similar signals that were not ...
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2022-02-16: Is The Wave Function The Building Block of Reality?
- 01:24: ... Schrodinger’s cat. A scientist puts a cute kitty in a closed box with a radioactive atom attached to a vial of poison gas. The atom has a 50-50 chance of ...
- 02:24: ... particles. So how far can the superposition extend? The atom, the radioactive detector, the vial of poison, the cat, the ...
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2021-12-29: How to Find ALIEN Dyson Spheres
- 05:27: ... candidate Dyson spheres, to be followed up by scanning for narrow-band radio emission, a much more telling signature of ...
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2021-10-13: New Results in Quantum Tunneling vs. The Speed of Light
- 02:22: In radioactive decay, particles that should never have enough energy to escape the nucleus are found to leak out.
- 03:55: We see tunneling everywhere, in radioactive decay of course, but this tunneling also drives many other important processes.
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2021-09-07: First Detection of Light from Behind a Black Hole
- 01:13: We talked about this soon after it came out - but to remind you, here we have radio light from charged particles whirling around the black hole.
- 01:28: ... - a team of hundreds of scientists and engineers synthesizing data from radio telescopes across the ...
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2021-08-10: How to Communicate Across the Quantum Multiverse
- 16:58: ... see that field in many ways, including by watching the radio light emitted by electrons spiraling in that magnetic field - what we ...
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2021-07-21: How Magnetism Shapes The Universe
- 07:15: When radio waves interact with those electrons, their polarizations are also affected.
- 08:12: So by measuring the Faraday rotation of distant radio sources we can also map magnetic fields.
- 12:14: In some cases, these jets puncture the galaxy and plume out in radio lobes which can dwarf the entire galaxy that spawned them.
- 12:23: ... carry magnetic fields out into the cosmos, and we see them through the radio light emitted by electrons that spiral slowly in these vast ...
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2021-07-13: Where Are The Worlds In Many Worlds?
- 00:20: ... one branch of the splitting quantum multiverse a radioactive nucleus decay, in another it doesn’t; in one “world” a quantum event in ...
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2021-05-25: What If (Tiny) Black Holes Are Everywhere?
- 03:08: ... waves with kilometers-long wavelengths, so really, really low energy radio ...
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2021-05-11: How To Know If It's Aliens
- 00:24: ... one of these, samples were injected with a nutrient solution laced with radioactive carbon. The idea of this labeled release experiment was that living ...
- 05:11: ... the signature of phosphine in the upper atmosphere of Venus from radio data taken with ALMA, the Atacama Large Millimeter/submillimeter Array. ...
- 09:58: ... Many of you have heard of the WOW signal. This was a weird spike of radio emission detected by the Big Ear radio telescope at Ohio State ...
- 10:35: ... has it? On April 29th, 2019 the Parkes Radio Telescope in Australia was studying the flare activity of Proxima ...
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2021-04-07: Why the Muon g-2 Results Are So Exciting!
- 07:11: Muons are nice, because they're easily produced in radioactive decay.
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2021-03-23: Zeno's Paradox & The Quantum Zeno Effect
- 05:23: ... in principle this would also work for radioactive decay, even chemical reactions The basic idea of the quantum Zeno effect ...
- 06:00: A constant radio-frequency field is tuned to cause electrons to oscillate smoothly between two energy levels - call them 1 and 2.
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2021-03-09: How Does Gravity Affect Light?
- 03:56: ... thought of as a clock - be it an electric charge pulsing up and down a radio antenna, or an atom vibrating back and forth in a glowing light filament ...
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2021-02-24: Does Time Cause Gravity?
- 09:04: They’re from a number of different radio telescopes, but were collated by the Parkes Observatory in Australia.
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2021-02-17: Gravitational Wave Background Discovered?
- 00:00: ... rotational rates the magnetized plasma between the stars also slows radio waves from pulsars and the relative motion of the earth the sun and the ...
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2020-11-04: Electroweak Theory and the Origin of the Fundamental Forces
- 01:02: You may have heard that it’s the force responsible for some types of radioactive decay.
- 01:24: It’s one of the main ways radioactive nuclei decay - the other being alpha decay, where the emitted “alpha particle” is really a helium-4 nucleus.
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2020-10-05: Venus May Have Life!
- 03:58: This can be done at far infrared and submillimeter radio wavelengths where the star’s own glare doesn’t kill the signal.
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2020-08-17: How Stars Destroy Each Other
- 06:16: ... past the earth to produce metronome-precise pulses - most brightly in radio light, but potentially at all ...
- 07:09: ... much always accompanied by the classic metronome-precise pulses of radio ...
- 08:35: The same gas blocks any radio light, but allows the more penetrating gamma ray light to pass through.
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2020-08-10: Theory of Everything Controversies: Livestream
- 00:00: ... work either my provocative quote is that the scientific method is the radio edit of great science but lee you've even gone further and said ...
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2020-07-08: Does Antimatter Explain Why There's Something Rather Than Nothing?
- 05:43: ... - are created all the time in nature - for example in the Sun, or in radioactive decay, or when cosmic rays hit the atmosphere, which is how antimatter ...
- 08:00: ... the Antiproton Decelerator, where they are slowed down by pulses of radiofrequency electric fields as they travel around the ring. They can then be ...
- 08:29: Positrons also fly into this trap from a radioactive sodium-22 source, and pair up with the anti-protons, creating anti-hydrogen.
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2020-06-08: Can Viruses Travel Between Planets?
- 07:38: ... is radiopanspermia, and it’s a compelling way to transport viruses because the mechanism is ...
- 10:37: ... likely UV exposure would destroy most viruses trying to hitch rides via radiopanspermia - and that’s good, because that’s the only known way to really spread ...
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2020-05-04: How We Know The Universe is Ancient
- 00:17: ... recent episode we learned how we calculate the age of the Earth based on radioactive decay in its most ancient ...
- 03:24: ... “big bang” was coined by the astronomer Fred Hoyle during a 1950 BBC radio broadcast. But not to popularize the idea - rather to mock it. Hoyle was ...
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2020-04-28: Space Time Livestream: Ask Matt Anything
- 00:00: ... I'm holding his laptop up there favorite science fact was about how radio-controlled I'm guessing planes can do a flip in the air and how it's all about ...
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2020-04-14: Was the Milky Way a Quasar?
- 10:51: ... MeerKAT telescope array discovered a handful of never-before-seen radio structures throughout the Galaxy — including two bubble-shaped ...
- 11:07: Just like the Fermi Bubbles, these radio bubbles seem to originate from our central black hole and extend in opposite directions above and below.
- 11:41: ... the energy required to power these radio bubbles is several thousand times lower than that required for the Fermi ...
- 14:01: ... the first to get the right age for the earth, significantly advance this radiometric dating technique, but he also discovered the disastrous lead levels in ...
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2020-04-07: How We Know The Earth Is Ancient
- 06:36: ... discovery of X-rays in 1895, and the discovery of radioactivity a year later, would open up a new world within the atom – and yield new ...
- 06:47: ... Rutherford, discovered that certain elements released energy from radioactive decay at an ever-decreasing rate. And that some of those elements would ...
- 07:17: ... the discovery of radioactivity also gave us our most accurate way to figure out the age of chunks of ...
- 07:58: ... - that’s the version or “isotope” of carbon with 8 neutrons. It’s radioactive, and decays with a half-life of 5,700 ...
- 10:22: ... is that the different half-lives of each uranium isotope means this radiometric technique is useful between hundreds of millions of years to many ...
- 10:35: ... that the Earth was between 1.6 to 3.0 billion years old, based on his radiometric dating. This was around the same time that astronomers proved that ...
- 11:02: ... have been found as old as 4.4 billion years, based on uranium-lead radiometric dating. But to go beyond that date we have to look beyond the Earth. We ...
- 11:55: ... of solar system. Nearly 4.6 billion years - we get the same number from radiometric dating of solar system meteorites and also from our calculations of the ...
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2020-03-16: How Do Quantum States Manifest In The Classical World?
- 00:20: ... is in an opaque box with a vial of deadly poison that’s released on the radioactive decay of an ...
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2020-03-03: Does Quantum Immortality Save Schrödinger's Cat?
- 02:25: As a refresher: a cat is in an opaque box with a vial of deadly poison, which is released on the radioactive decay of an atom.
- 02:33: ... a totally random 50-50 chance of the radioactive decay over a certain period of time - that means the quantum ...
- 03:32: ... instead of a vial of poison attached to one radioactive atom, connect the vial to many atoms - so that the poison is released if ...
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2020-01-13: How To Capture Black Holes
- 00:24: ... in a new way we discover new things. When we figured out how to see in radio waves quasars and supernova remnants lit up the sky, When we learned to ...
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2019-12-02: Is The Universe Finite?
- 00:33: We can’t see this microwave light with our eyes, but we can catch it with even a simple radio antenna.
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2019-10-15: Loop Quantum Gravity Explained
- 12:41: ... high-energy gamma rays travelling a wee bit slower than low energy radio waves due to the way they propagate through the graininess of a loop ...
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2019-08-12: Exploring Arecibo in VR 180
- 00:13: ... And today, we've bought a 180 camera to check out this incredible radio telescope. Let's ...
- 01:02: ... is literally an entire valley filled with a radio telescope and let me get out of your way so you can see this That dish ...
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2019-07-01: Thorium and the Future of Nuclear Energy
- 00:33: ... power plants than ever died in nuclear reactor accidents In fact, the radioactivity around coal fire plants is also higher due to the traced but completely ...
- 02:49: ... uranium on the actinide sequence of the periodic table They are very radioactive and have half-lives of tens of thousands of years That means they're ...
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2019-06-17: How Black Holes Kill Galaxies
- 12:26: On the other hand, the presence of highly radioactive stuff with very short half-lives is a telltale sign of recent merger.
- 12:39: ... a silly mistake I said that the half-life is the average decay time of a radioactive element It's ...
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2019-06-06: The Alchemy of Neutron Star Collisions
- 02:47: ... nuclei produced in the r-process are unstable these isotopes undergo radioactive decay into lighter elements after being created in a neutron star ...
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2019-05-16: The Cosmic Dark Ages
- 05:45: ... cold hydrogen gas flips its spin direction it either absorbs or emits a radio photon with a wavelength of 21cm. When the first stars ignited they ...
- 12:02: ... cosmic dark ages themselves using new generations of extremely sensitive radio telescope to catch more of those elusive 21cm ...
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2019-05-09: Why Quantum Computing Requires Quantum Cryptography
- 15:41: Munrais asks whether putting radio telescopes around the sun would improve the resolution of an interferometer.
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2019-05-01: The Real Science of the EHT Black Hole
- 03:50: ... this resolution is around 1mm, which is around the shortest wavelength radio ...
- 04:24: ... Event horizon Telescope - the EHT - consists of nine radio observatories across the globe, from the south pole to Greenland - and ...
- 07:43: Remember that the EHT observes radio light with a wavelength of around a millimeter.
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2019-02-20: Secrets of the Cosmic Microwave Background
- 00:08: ... static buzz your hear is mostly due to the ambient radio produced by our noisy pre-galactic Civilization But Around 1% of that ...
- 12:34: ... faint noisy buzz So next time you hear the static of an untuned TV or radio remember that in that noise can be found the secrets of the earliest ...
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2018-12-12: Quantum Physics in a Mirror Universe
- 00:02: ... the same way we tested this using the cobalt-60 atom the nucleus of this radioactive isotope of cobalt decays via the weak interaction into nickel by ...
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2018-12-06: Did Life on Earth Come from Space?
- 00:37: ... their star's own radiation and be ejected from the solar system this is Radio panspermia stars may be constantly spraying their germy life through the ...
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2018-11-14: Supersymmetric Particle Found?
- 04:40: In fact, it's a cosmic ray detector disguised as a neutrino detector disguised as a radio antenna disguised as a hot air balloon.
- 06:31: ANITA is a cluster of radio antennae that hovers 37 kilometers above Antarctica.
- 06:37: ... decays in the ice anywhere within 700 kilometers of ANITA, the resulting radio frequency Cherenkov can be seen by ANITA'S ...
- 06:55: That allows it to sort out neutrino radio flashes from the flashes produced by other cosmic rays coming in from above.
- 07:29: ... were a little confused when they spotted two extremely high energy radio bursts that could only have been produced by a high energy particle ...
- 09:23: This then causes a high energy radio flash coming from directly below.
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2018-11-07: Why String Theory is Right
- 16:28: You have a box containing a vial of poison connected to a radioactive isotope that could either decay or not, releasing the poison.
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2018-10-31: Are Virtual Particles A New Layer of Reality?
- 13:54: ... about the behavior of aliens, saying things like the window of strong radio emission for any civilization is too short to overlap with us or aliens ...
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2018-10-25: Will We Ever Find Alien Life?
- 01:02: ... ways that an advanced civilization could give away their presence; radio transmissions, robotic probes, or star-blotting solar ...
- 03:10: We've been actively watching for radio transmissions from other worlds for half a century.
- 03:38: But radio transmissions may not be our most likely first encounter with ET.
- 07:23: ... factors like the fraction of intelligent life that transmits radio signals and how long that communicative civilization ...
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2018-10-10: Computing a Universe Simulation
- 13:10: That led to the radio emission arriving hours after the gravitational waves.
- 13:15: But that's radio, which can interact strongly with the rare charged electrons and protons in intergalactic space.
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2018-09-12: How Much Information is in the Universe?
- 14:27: ... are more commonly used for radioactive elements, but can be used for anything that has a constant probability ...
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2018-08-30: Is There Life on Mars?
- 06:20: In it a soil sample is fed nutrients laced with radioactive carbon-14.
- 06:26: Any microbes should metabolize the nutrients and expel radioactive CO2.
- 06:32: Right away, both probes detected these radioactive gases.
- 11:51: This is the same way we map the ocean, by analyzing radio waves reflected from layers below the surface.
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2018-08-23: How Will the Universe End?
- 07:44: They slowly leak away their mass as a cool heat [INAUDIBLE] of random particles for the most part faint radio light.
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2018-08-01: How Close To The Sun Can Humanity Get?
- 04:08: Finally, it will detect radio waves from processes responsible for the acceleration of particles in the solar wind.
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2018-05-02: The Star at the End of Time
- 10:25: ... the Event Horizon Telescope has now detected radio emission from pretty close to the event horizon of Sag A*, which ...
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2018-04-18: Using Stars to See Gravitational Waves
- 05:59: The international pulsar timing array is a massive effort spanning many universities and radio observatories around the world.
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2018-03-28: The Andromeda-Milky Way Collision
- 09:25: ... Channel says, "If they detected this with current radio telescopes, I cannot imagine what they will discover with the square ...
- 09:40: ... EDGES experiment integrated for hundreds of days and added together the radio signal from the whole sky to measure their signal of the first ...
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2018-03-21: Scientists Have Detected the First Stars
- 01:42: That photon has a wavelength of 21 centimeters, which is radio light.
- 03:26: Their edges experiment is part of the Murchison Radio-Astronomy Observatory in Western Australia.
- 03:31: This is one of the most radio quiet locations on the planet, far from any human-made interference.
- 03:37: That's because is remote, not because Australians don't have radio yet, despite the rumors.
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2017-11-29: Citizen Science + Zero-Point Challenge Answer
- 05:08: This all started with the City at Home program, which looks through radio data for signs of signals from intelligent life.
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2017-11-22: Suicide Space Robots
- 08:58: ... unlike the long silent Pioneer spacecraft, Voyager 1 still sends faint radio signals, bringing us our first and only direct measurements from beyond ...
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2017-10-04: When Quasars Collide STJC
- 01:12: ... by Preeti Kharb and Dharam Vir Lal from India's National Center for Radio Astrophysics, and David Merritt from the Rochester Institute of ...
- 03:59: ... short the target is observed with radio telescopes on opposite sides of the planet, and phase differences in the ...
- 04:12: In fact, the spatial resolution is equivalent to what you would get with a telescope equal in size to the separation of the radio antenna.
- 04:36: Here's the radio map at 15 gigahertz frequency.
- 04:47: So what we're actually seeing here is radio emission from jets.
- 05:15: The radio light seen here is from electrons spiraling in those magnetic fields, so-called synchrotron radiation.
- 05:27: ... frequently see separate knots of radio light in AGN jets, which can splatter as their fuel supply changes or as ...
- 06:02: Well, the researchers tested this by looking at multiple frequencies to get a crude radio spectrum.
- 06:14: Spiraling electrons produce radio waves a lots of frequencies all the way down to very low energies.
- 06:21: ... begins, we think the matter should be so dense that the lowest energy radio waves have trouble escaping the ...
- 09:38: Longer exposure radio observations will pin down the energy distribution to confirm whether these really are jets produced by two black holes.
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2017-08-24: First Detection of Life
- 00:47: ... measure the spectrum of Earth's atmosphere, take pictures, and look for radio emission during this brief flyby ...
- 06:26: Galileo even captured radio signatures from Earth.
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2017-08-16: Extraterrestrial Superstorms
- 08:10: ... carries eight instruments, including a radiometer for probing the atmospherics high-pressure depths, an imaging ...
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2017-05-03: Are We Living in an Ancestor Simulation? ft. Neil deGrasse Tyson
- 00:37: In fact, with its director Neil deGrasse Tyson, along with comedian Eugene Mirman, as part of Neil's "StarTalk" radio show.
- 03:07: You can check out more on "StarTalk" radio, link in the description.
- 12:20: If you want to see more of my chat with Neil deGrasse Tyson, head over to "StarTalk" radio, "Cosmic Queries," link below.
- 12:36: It gets pretty philosophical and mind bending, as is much of "StarTalk" radio, very highly recommended.
- 13:48: In fact, this is why high radioactivity results in high cancer risk.
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2017-04-19: The Oh My God Particle
- 01:42: Radioactivity was discovered by Mary Curie and Henri Bacquerel at the end of the 1800s.
- 01:48: High energy particles, electrons, and small atomic nuclei, as well as gamma rays, are ejected when heavier radioactive elements decay.
- 01:55: We're bathed in a very low level of this radiation due to naturally occurring radioactive elements in the Earth.
- 02:02: ... after its discovery, this ambient radioactive flux was found to weaken with height above the ground, because the ...
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2017-03-29: How Time Becomes Space Inside a Black Hole
- 08:34: In fact though, it was emitted at larger radio than wherever we encounter it.
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2017-01-25: Why Quasars are so Awesome
- 01:19: Sometimes they even have jets of near light speed particles filling the surrounding universe with giant radio plumes.
- 01:49: When the very first radio telescopes pointed to the heavens, they saw fat blobs of radio light, whose sources were unknown.
- 01:57: ... blobs were only blobby because those early radio antennae had some pretty bad spatial resolution, making it difficult to ...
- 02:13: In an event known as an occultation, the moon passed right in front of one of the brightest of these radio blobs.
- 02:20: It was object number 273 in the brand new 3rd Cambridge Radio Catalog-- 3C273, for short.
- 02:30: ... Parkes radio telescope in Australia was trained on the occultation and registered the ...
- 02:38: That timing allowed astronomers to identify a tiny star-like point of bluish light as the source of the radio emission.
- 02:56: And so the name quasi stellar radio source was born.
- 05:34: ... through the galaxy and even filling intergalactic space with beautiful radio ...
- 05:45: We call these radio galaxies.
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2017-01-11: The EM Drive: Fact or Fantasy?
- 01:23: ... White, et al., 2016 "Measurement of Impulsive Thrust from a Closed Radio-Frequency Cavity in Vacuum." First, a bit of ...
- 09:56: So in our recent episode, we talked about whether alien civilizations could possibly detect us from radio transmissions.
- 10:05: Harlan Kempf asks whether a radio interferometer could be built across multiple planets and what would be the effect on resolution.
- 10:54: But I'm no radio astronomer, so there are probably enormous difficulties in actually achieving that.
- 11:09: SunPower Guru argues that SITI is pointless, because there's no good reason to think that aliens would use, for example, radio.
- 12:22: There's very good reason to think that aliens will use light, with a radio or otherwise.
- 12:28: Speaking of not using radio, Richy Rich and Gareth Dean had a nice discussion on whether aliens would use radio waves.
- 13:01: Radio is much better at that and so is the natural choice for reaching many listeners or if you don't know where your listener is.
- 13:16: Since the 1960s, our own radio leakiness has diminished, with narrowing broadcast frequency bands, fiberoptics, etc.
- 13:26: ... may be that an emerging civilisation's radio loud bubble is really a very thin shell, and so catching it could be ...
- 13:42: In that case, radio is still the way to go, and it's worthwhile for us to search at radio frequencies.
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2017-01-04: How to See Black Holes + Kugelblitz Challenge Answer
- 02:59: It's a collaboration of currently nine and eventually 12 or more radio telescopes distributed across the planets.
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2016-12-21: Have They Seen Us?
- 00:00: ... PLAYING] A century of Earth's radio transmissions has now washed over thousands of other star systems, ...
- 00:31: ... planet, even from the nearest neighboring star, would have seen nothing, radio quietness until only around a century ...
- 00:42: ... sporadic buzz of the first experiments with wireless transmission, the radio brightness of this small planet would have bloomed into a continuous ...
- 01:13: And it carries with it the first transatlantic radio transmission of Marconi himself.
- 01:18: ... Olympics, episodes of the "Lone Ranger," and Orson Welles' ill-fated radio adaptation of "War of the Worlds." That shell has washed over several ...
- 02:44: ... peered into the so-called water hole, a narrow frequency range in the radio spectrum between a pair of H and OH emission spikes, which itself is ...
- 03:13: ... of SETI programs followed, utilizing several of the world's great radio telescopes, like Arecibo in Puerto Rico and the Parkes radio telescope ...
- 03:35: ... 1977 Wow! signal is the most compelling, a narrow-frequency radio blast detected in the water hole, that still has no broadly accepted ...
- 04:06: The radio leakage produced by their own internal broadcasts would be much harder to detect.
- 05:07: ... of the reasons it's hard to spot unintentional radio leakage is that a distant civilization's radio bubble is likely to ...
- 06:02: But there is a way to peer straight through our own radio noise as though it wasn't there.
- 06:10: Two radio telescopes separated by a large enough distance can filter out local transmissions.
- 07:00: Arrays of thousands of radio dishes will be built in Africa and hundreds of thousands of antenna installed in Australia.
- 07:07: When connected up, it'll effectively form a giant radio telescope, with over a square kilometer surface area.
- 07:33: One of its primary purposes will be to catch the radio emission from hydrogen gas in the extremely early universe.
- 07:49: But if such radio waves travel to us from the earliest of times, then they become stretched out as they travel through an expanding universe.
- 08:06: To spot these radio photons, we need a truly gigantic interferometer, both for extreme sensitivity and to eliminate our own radio buzz.
- 08:42: Loeb and Zaldarriga's numbers assume pointing SKA at a target star system for an entire month and adding up all of the radio emission over that time.
- 08:53: For an artificial radio source, that would look like emission over a narrow-frequency range that doesn't correspond to any natural process.
- 10:04: ... aliens would need a radio telescope trillions of times the SKA's surface area and equivalent to a ...
- 10:20: Although it's exceedingly unlikely that there's one of those within our radio bubble.
- 10:45: But remember, humanity is young as a radio-noisy civilization.
- 12:04: If there's a slightly more technologically advanced civilization within our radio bubble, they've probably seen us.
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2016-11-16: Strange Stars
- 07:40: ... years later, after some small technological advancements, we pointed our radio telescopes and then the orbiting Chandra X-ray Observatory to that spot ...
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2016-10-26: The Many Worlds of the Quantum Multiverse
- 02:40: A machine containing a radioactive element is set to shatter the flask in the event that the radioactive element decays.
- 02:51: That radioactive decay is a purely quantum process.
- 05:23: ... if the family of possible states extends beyond the radioactive decay, beyond the cat, and includes the observer and, indeed, the entire ...
- 05:33: ... it's because we're part of an entire quantum timeline in which the radioactive decay and subsequent poisoning never ...
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2016-10-05: Are We Alone? Galactic Civilization Challenge
- 01:23: And at the high end, there should be civilisations within 100 light years, which may have detected our own radio transmissions by now.
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2016-08-24: Should We Build a Dyson Sphere?
- 09:52: I guess it couldn't hurt to point some radio telescopes, to look for power leakage from the Kugelblitz swarm.
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2016-07-20: The Future of Gravitational Waves
- 05:41: ... tunnel out of the nucleus of a polonium-212 atom, causing the atom's radioactive ...
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2016-06-29: Nuclear Physics Challenge
- 00:46: This drives the alpha decay of radioactive elements.
- 00:52: But don't literally take it, because it's one of the most radioactive elements known, and it decays as alpha particles tunnel out of its nucleus.
- 01:02: It's so radioactive that it glows blue as these alpha particles ionize the air around it.
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2016-06-01: Is Quantum Tunneling Faster than Light?
- 04:41: When it's an alpha particle escaping a nucleus, this is one of the most important mechanisms for radioactive decay.
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2016-05-18: Anti-gravity and the True Nature of Dark Energy
- 12:09: Well, the idea is to beam the data back with low-power lasers, or perhaps alternatively to use the sail itself as an antenna for radio transmission.
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2016-04-20: Why the Universe Needs Dark Energy
- 11:05: ... demand for bachelor's or masters physicists, like medical imaging or radiology, energy industries, meteorology, science education, science journalism, ...
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2016-03-30: Pulsar Starquakes Make Fast Radio Bursts? + Challenge Winners!
- 00:13: Fast radio bursts are an example of that.
- 00:16: Until recently, we had no idea what the sudden flashes of radio emission coming from mysterious events out there in the universe really were.
- 00:30: So an FRB is seen as a very quick flash of broad frequency radio emission from some spot on the sky.
- 01:30: A fast radio burst repeated itself.
- 02:14: But now that we know that fast radio bursts can repeat, we're sure to catch one in the act and puzzle this one out before too long.
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2016-02-11: LIGO's First Detection of Gravitational Waves!
- 05:55: ... using multiple telescopes that span the electromagnetic spectrum from radio to visible to ...
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2015-10-28: Is The Alcubierre Warp Drive Possible?
- 09:33: Radio telescopes are now pointed at it.
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2015-08-27: Watch THIS! (New Host + Challenge Winners)
- 04:07: And the effective potential formulation for radio [INAUDIBLE].
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2015-06-24: The Calendar, Australia & White Christmas
- 06:16: ... McLean asked, "if aliens can't pick up our radio waves, then why are we trying to listen for alien radio waves with ...
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2015-06-17: How to Signal Aliens
- 00:49: Let's start with the radio.
- 00:50: ... misconception, it could be very difficult for aliens to pick up the radio and TV transmissions that we've been leaking into space since around ...
- 00:58: ... growing consensus is that, even if nearby aliens have space-based radio receivers with the total area equivalent to a large city pointed right ...
- 01:13: So what would it take to have a radio beacon that operated fairly continuously and could be detected?
- 01:27: ... they suggested that the optimal solution would be a phased array of many radio telescopes sending narrow pulses of high-powered microwaves at ...
- 03:06: But as with radio, the continuous energy usage would be very expensive.
- 05:55: ... besides looking for radio signals and laser pulses, which SETI does now, should SETI also be ...
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2015-04-01: Is the Moon in Majora’s Mask a Black Hole?
- 08:14: Tharks asks whether given enough time, the CMB will eventually redshift into the FM radio band.
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2015-02-25: How Do You Measure the Size of the Universe?
- 03:22: In more extreme cases, the wavelength can be stretched out of the visible spectrum altogether, into microwaves or radio waves.
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2015-02-18: Is It Irrational to Believe in Aliens?
- 01:19: The details are different, since Drake, the founder of SETI, was estimating the number of detectable alien radio signals.
- 04:17: ... one other such species that's jetted around the cosmos, something like radio signals, space station probes, a broken down Millenium Falcon, I don't ...
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87 result(s) shown.