Search PBS Space Time

What are you looking for?

	2022-12-08: How Are Quasiparticles Different From Particles? 00:12: But the only elementary particle actually flowing in the circuit are the negatively charged electrons. 03:32: ... gaps in the underfilled valence shells - so we have flowing positively charged electron holes and a p-type ... 10:50: At the same time, the negatively charged electrons in a metal lattice attract the positive nuclei. 03:32: ... gaps in the underfilled valence shells - so we have flowing positively charged electron holes and a p-type ... 00:12: But the only elementary particle actually flowing in the circuit are the negatively charged electrons. 10:50: At the same time, the negatively charged electrons in a metal lattice attract the positive nuclei.
	2022-11-23: How To See Black Holes By Catching Neutrinos 01:32: ... neutrinos are electrically neutral and have much lower masses than the charged ... 03:50: ... will continue through the ice, emitting light as it interacts with other charged ... 04:32: ... expanding EM waves created by the charged particle expand slower than the particle itself, so their wavefronts ... 01:32: ... neutrinos are electrically neutral and have much lower masses than the charged counterparts. ... 04:32: ... expanding EM waves created by the charged particle expand slower than the particle itself, so their wavefronts overlap each ... 03:50: ... will continue through the ice, emitting light as it interacts with other charged particles. ...
	2022-11-16: Are there Undiscovered Elements Beyond The Periodic Table? 06:40: ... the electromagnetic force trying to force apart all those positively charged protons, and the strength of that force is great due to the proximity of ...
	2022-09-14: Could the Higgs Boson Lead Us to Dark Matter? 06:01: ... that excludes the electrically charged leptons: electrons, muons and tau particles; it excludes the quarks and ...
	2022-08-24: What Makes The Strong Force Strong? 00:28: ... so the negatively-charged electrons are attracted by the positively charged ... 06:03: Electrically charged particles interact with each other via the electromagnetic field. 06:07: We can think of each charged particle as generating a constant buzz of virtual photons around it, forming what we think of as its EM field. 06:03: Electrically charged particles interact with each other via the electromagnetic field. 00:28: ... so the negatively-charged electrons are attracted by the positively charged protons. ...
	2022-08-03: What Happens Inside a Proton? 01:31: ... describes the interactions of electrons and any other charged particle   via photons. We’re going to come back  to a ...
	2022-06-30: Could We Decode Alien Physics? 16:39: ... Well actually a magnetic shield may be   enough to block many charged particles, but  neutral particles like dust would pass ... 01:25: ... alien Maxwell’s equations   which govern the interactions of charged  particles will reveal that they use a flipped   sign ... 06:55: ... there yet. The Franklin convention for the sign of electrically charged   particles is not the only arbitrary choice we’ve  made in our ...
	2022-05-04: Space DOES NOT Expand Everywhere 13:50: ... our hair out writing this episode, gave the correct answer: when a charged particle is created in a particle collider it travels through the ...
	2022-02-16: Is The Wave Function The Building Block of Reality? 11:09: ... other collapsing field. If the quantum object happens to be electrically charged, then the constant jiggling and acceleration caused by this Brownian ...
	2022-01-27: How Does Gravity Escape A Black Hole? 06:16: ... example the electromagnetic force is communicated between charged particles by transferring virtual photons - ephemeral excitations in the ... 10:45: Because when you look at a charged black hole you still have causal contact with all the charge that fell into it. 06:16: ... example the electromagnetic force is communicated between charged particles by transferring virtual photons - ephemeral excitations in the ...
	2021-10-05: Why Magnetic Monopoles SHOULD Exist 06:49: So magnetic fields affect charged particles. 06:57: Imagine a charged particle - say an electron - passing by a Dirac string. 06:49: So magnetic fields affect charged particles.
	2021-09-15: Neutron Stars: The Most Extreme Objects in the Universe 02:00: ... due to their opposite electric charges. These and   other charged particles end up being blasted out along the poles of the magnetic ... 04:39: ... how nuclei can bind to each other given that they’re all positively charged and so should   repel. Well, at these densities nuclei ... 05:48: ... iron nuclei in a process called electron capture. The negatively charged electrons   merge with positively charged protons to  ... 02:00: ... due to their opposite electric charges. These and   other charged particles end up being blasted out along the poles of the magnetic ... 05:48: ... The negatively charged electrons   merge with positively charged protons to  produce neutrons. In this way, Iron is   converted ...
	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.
	2021-08-03: How An Extreme New Star Could Change All Cosmology 09:51: ... stars and planets are generated by dynamos - self-sustaining currents of charged particles. A collision like this could well produce the sort of ...
	2021-07-21: How Magnetism Shapes The Universe 01:39: It’s generated when electrically charged particles move. 02:30: ... a moving charged particle will feel a force perpendicular to both its direction of motion ... 04:21: We can see those tangled field lines in ultraviolet light as charged particles spiral along them, up and down from the Sun’s surface. 08:30: These are the densest regions of those galactic disks - places where magnetic fields have confined the charged particles of the interstellar plasma. 02:30: ... a moving charged particle will feel a force perpendicular to both its direction of motion and to ... 01:39: It’s generated when electrically charged particles move. 02:30: ... of motion and to the field lines - and the net result of that is that charged particles tend to spiral around magnetic field ... 04:21: We can see those tangled field lines in ultraviolet light as charged particles spiral along them, up and down from the Sun’s surface. 08:30: These are the densest regions of those galactic disks - places where magnetic fields have confined the charged particles of the interstellar plasma. 04:21: We can see those tangled field lines in ultraviolet light as charged particles spiral along them, up and down from the Sun’s surface. 02:30: ... of motion and to the field lines - and the net result of that is that charged particles tend to spiral around magnetic field ...
	2021-01-26: Is Dark Matter Made of Particles? 02:05: Any electrically charged particle experiences the electromagnetic force and can communicate with other charged particles by exchanging photons.
	2020-12-22: Navigating with Quantum Entanglement 02:52: ... in their beaks which help them orient; others have proposed electrically charged fluids sloshing around in the inner ... 04:56: Magnetic fields exert a force on a moving or rotating charged particle. 02:52: ... in their beaks which help them orient; others have proposed electrically charged fluids sloshing around in the inner ... 04:56: Magnetic fields exert a force on a moving or rotating charged particle.
	2020-11-04: Electroweak Theory and the Origin of the Fundamental Forces 02:36: ... effort was quantum electrodynamics, in which charged particles interact not by actually touching - but via a mediating ... 03:12: Given that the weak interaction could change a neutral particle into a pair of charged particles this mediating particle must itself be charged. 03:20: This was an early hint that somehow the electromagnetic force, which acts on charged particles, was playing a role here. 02:36: ... effort was quantum electrodynamics, in which charged particles interact not by actually touching - but via a mediating particle that ... 03:12: Given that the weak interaction could change a neutral particle into a pair of charged particles this mediating particle must itself be charged. 03:20: This was an early hint that somehow the electromagnetic force, which acts on charged particles, was playing a role here. 02:36: ... effort was quantum electrodynamics, in which charged particles interact not by actually touching - but via a mediating particle that transmits ...
	2020-08-24: Can Future Colliders Break the Standard Model? 01:22: ... or linac, which uses oscillating electric fields to accelerate charged particles in a straight line, while the beam is focused by magnetic ...
	2020-08-17: How Stars Destroy Each Other 04:38: ... charged particles spiral along the magnetic field lines they emit synchrotron ...
	2020-06-30: Dissolving an Event Horizon 04:02: There’s a similar situation with the charged black hole - which, absent rotation, is described by the Reisner-Nordstrom metric. 05:24: And actually there’s another way to do it in the case of the charged black hole. 05:52: So that means a massive CHARGED black hole will slowly leak away its mass while retaining its charge. 06:31: ... the universe decay, we may be left with only radiation and these naked, charged ... 09:09: For charged black holes the situation is in some ways easier, but has its own weirdness. 09:23: A charged black hole in the vicinity of any matter would repel like charges and attract and swallow opposite charges, and so quickly neutralize. 09:32: But imagine we create a charged black hole and isolate it from all other matter. 09:37: Then surely we can just throw charged particles into the black hole. 04:02: There’s a similar situation with the charged black hole - which, absent rotation, is described by the Reisner-Nordstrom metric. 05:24: And actually there’s another way to do it in the case of the charged black hole. 05:52: So that means a massive CHARGED black hole will slowly leak away its mass while retaining its charge. 09:09: For charged black holes the situation is in some ways easier, but has its own weirdness. 09:23: A charged black hole in the vicinity of any matter would repel like charges and attract and swallow opposite charges, and so quickly neutralize. 09:32: But imagine we create a charged black hole and isolate it from all other matter. 04:02: There’s a similar situation with the charged black hole - which, absent rotation, is described by the Reisner-Nordstrom metric. 05:24: And actually there’s another way to do it in the case of the charged black hole. 05:52: So that means a massive CHARGED black hole will slowly leak away its mass while retaining its charge. 09:23: A charged black hole in the vicinity of any matter would repel like charges and attract and swallow opposite charges, and so quickly neutralize. 09:32: But imagine we create a charged black hole and isolate it from all other matter. 09:09: For charged black holes the situation is in some ways easier, but has its own weirdness. 09:37: Then surely we can just throw charged particles into the black hole. 06:31: ... the universe decay, we may be left with only radiation and these naked, charged singularities. ...
	2020-05-18: Mapping the Multiverse 01:33: Now, we’re going to focus on rotating black holes here, but a lot of this also applies to charged black holes, as we’ll see. 12:58: This whole counter-streaming instability thing was figured out by Roger Penrose in the context of charged, non-rotating black holes. 13:13: ... electrically charged, or Reissner-Nordström black holes the electromagnetic field within ... 01:33: Now, we’re going to focus on rotating black holes here, but a lot of this also applies to charged black holes, as we’ll see. 12:58: This whole counter-streaming instability thing was figured out by Roger Penrose in the context of charged, non-rotating black holes.
	2020-04-22: Will Wormholes Allow Fast Interstellar Travel? 01:09: ... thread the funnels with electromagnetic field lines then they act like charged ... 11:48: ... not need exotic matter - and that’s the wormhole through a rotating or charged black hole. Now I’ve promised a more in-depth episode on rotating black ... 01:09: ... thread the funnels with electromagnetic field lines then they act like charged particles. ...
	2020-03-24: How Black Holes Spin Space Time 10:51: ... spins up the magnetic field into a gigantic particle accelerator. Charged particles are accelerated along those magnetic field and can radiate ...
	2020-01-06: How To Detect a Neutrino 01:37: ♪ ♪ ♪ ♪ Neutrinos also come in three flavors: ♪ ♪ one for each of the charged leptons. 03:09: ♪ ♪ More magnetic fields are used to sort the positively charged pion particles from the debris ♪ ♪ and focus *them* into a beam. 05:37: ... interacts in our detector, ♪ ♪ an Argon nucleus is broken apart and charged particles are released - in particular, pions and ... 01:37: ♪ ♪ ♪ ♪ Neutrinos also come in three flavors: ♪ ♪ one for each of the charged leptons. 05:37: ... interacts in our detector, ♪ ♪ an Argon nucleus is broken apart and charged particles are released - in particular, pions and ... 03:09: ♪ ♪ More magnetic fields are used to sort the positively charged pion particles from the debris ♪ ♪ and focus *them* into a beam.
	2019-09-03: Is Earth's Magnetic Field Reversing? 00:38: Magnetic fields exert a force on moving charged particles, causing them to spiral around those force lines. 00:46: Now, that’s helpful, because Earth is constantly bombarded by very fast moving charged particles, especially coming from the Sun. 03:15: Alternatively, flows of many charged particles like electrons – so electrical currents - can produce magnetic fields. 00:38: Magnetic fields exert a force on moving charged particles, causing them to spiral around those force lines. 00:46: Now, that’s helpful, because Earth is constantly bombarded by very fast moving charged particles, especially coming from the Sun. 03:15: Alternatively, flows of many charged particles like electrons – so electrical currents - can produce magnetic fields. 00:38: Magnetic fields exert a force on moving charged particles, causing them to spiral around those force lines.
	2019-03-06: The Impossibility of Perpetual Motion Machines 13:47: ... the stars, and also from individual electrons either bumping into other charged particles or circling in magnetic fields Fortunately we can model that ...
	2019-02-07: Sound Waves from the Beginning of Time 03:08: ... interaction between the charged particles of the plasma via the trapped photons meant that ripples in ...
	2019-01-16: Our Antimatter, Mirrored, Time-Reversed Universe 03:02: ... this work in our Antion on a clock well antimatter atoms have negatively charged nuclei which means their nuclear magnetic fields point in the opposite ...
	2018-10-10: Computing a Universe Simulation 13:15: But that's radio, which can interact strongly with the rare charged electrons and protons in intergalactic space.
	2018-08-23: How Will the Universe End? 14:35: Classically, we assumed the electron was a ball of charged stuff, hence g equals 1.
	2018-08-15: Quantum Theory's Most Incredible Prediction 01:13: ... calculations of QED describe how this field interacts with charged particles to give us the electromagnetic force, which binds electrons to ... 11:32: This is the fundamental constant governing the strength of the electromagnetic interaction of charged particles. 01:13: ... calculations of QED describe how this field interacts with charged particles to give us the electromagnetic force, which binds electrons to atoms, ... 11:32: This is the fundamental constant governing the strength of the electromagnetic interaction of charged particles.
	2018-08-01: How Close To The Sun Can Humanity Get? 02:19: Charged particles traveling at nearly 1% the speed of light bombarded the earth. 04:51: ... will capture the most energetic particles of the solar wind-- charged particles like electrons, protons, and heavier nuclei, measuring their ... 02:19: Charged particles traveling at nearly 1% the speed of light bombarded the earth. 04:51: ... will capture the most energetic particles of the solar wind-- charged particles like electrons, protons, and heavier nuclei, measuring their energies ... 02:19: Charged particles traveling at nearly 1% the speed of light bombarded the earth.
	2018-07-04: Will A New Neutrino Change The Standard Model? 05:05: ... example, both left and right chiral negatively charged electrons have their own positively charged antimatter particles, which ...
	2018-06-20: The Black Hole Information Paradox 13:11: And it turns out that a charged black hole has a pretty weird Penrose diagram. 13:29: In the mathematics, it looks as though anything falling into a charged black hole is ejected into a separate universe. 13:11: And it turns out that a charged black hole has a pretty weird Penrose diagram. 13:29: In the mathematics, it looks as though anything falling into a charged black hole is ejected into a separate universe. 13:11: And it turns out that a charged black hole has a pretty weird Penrose diagram. 13:29: In the mathematics, it looks as though anything falling into a charged black hole is ejected into a separate universe.
	2018-04-04: The Unruh Effect 09:06: A charged particle accelerating in a magnetic field emits radiation, bremsstrahlung radiation. 09:13: An inertial observer sees the charged particle itself radiating, its energy extracted from the magnetic field. 09:19: But an observer accelerating with that charged particle sees it absorbing Unruh particles and then spitting them out again. 09:06: A charged particle accelerating in a magnetic field emits radiation, bremsstrahlung radiation. 09:13: An inertial observer sees the charged particle itself radiating, its energy extracted from the magnetic field. 09:19: But an observer accelerating with that charged particle sees it absorbing Unruh particles and then spitting them out again. 09:06: A charged particle accelerating in a magnetic field emits radiation, bremsstrahlung radiation. 09:19: But an observer accelerating with that charged particle sees it absorbing Unruh particles and then spitting them out again.
	2018-01-10: What Do Stars Sound Like? 12:33: As Felix realizes, light is not electrically charged, and so it isn't affected by EM fields. 12:39: In fact, the magnetic field of a gamma ray burst focuses charged particles-- electrons and the nuclei of the exploding star. 12:56: The charged particles spiral around the axial magnetic fields and emit photons as they do. 13:17: ... of the light emitted in the same direction as the near light speed charged particles of the ... 12:39: In fact, the magnetic field of a gamma ray burst focuses charged particles-- electrons and the nuclei of the exploding star. 12:56: The charged particles spiral around the axial magnetic fields and emit photons as they do. 13:17: ... of the light emitted in the same direction as the near light speed charged particles of the ... 12:39: In fact, the magnetic field of a gamma ray burst focuses charged particles-- electrons and the nuclei of the exploding star. 12:56: The charged particles spiral around the axial magnetic fields and emit photons as they do.
	2017-10-19: The Nature of Nothing 04:33: For example, QFT describes the electromagnetic force as the exchange of virtual photons between charged particles.
	2017-09-28: Are the Fundamental Constants Changing? 03:42: In the language of quantum field theory, it's the coupling strength between the electromagnetic field and a charged field like the electron field.
	2017-08-10: The One-Electron Universe 03:45: Well, moving charged particles also produce a current-- an electric currents. 03:58: ... example, if a negatively charged electron is moving to the left, it produces some current, I. Then, an ... 04:15: And a positively charged positron moving to the left also produces the same opposite signed minus I current. 03:58: ... example, if a negatively charged electron is moving to the left, it produces some current, I. Then, an electron ... 03:45: Well, moving charged particles also produce a current-- an electric currents. 04:15: And a positively charged positron moving to the left also produces the same opposite signed minus I current.
	2017-07-26: The Secrets of Feynman Diagrams 05:04: Similarly, if a photon creates a negatively charged electron, it must also create a positively charged positron.
	2017-04-19: The Oh My God Particle 03:48: These cascades are called air showers, streams of charged particles cause the air to fluoresce, a glow that can be seen by specialized telescopes.
	2017-04-05: Telescopes on the Moon 05:00: Tiny shards of electrically charged glass-- in other words, moondust. 11:33: ... electric field in a charged black hole at the singularity is expected to produce an ... 05:00: Tiny shards of electrically charged glass-- in other words, moondust.
	2017-03-15: Time Crystals! 02:01: Wilczek came up with a simple model in which charged particles in a superconducting ring break what we call continuous time translational symmetry. 04:03: Set up a chain of ions, so electrically charged atoms. 02:01: Wilczek came up with a simple model in which charged particles in a superconducting ring break what we call continuous time translational symmetry.
	2017-01-04: How to See Black Holes + Kugelblitz Challenge Answer 10:41: ... the sun, but hey, we just built an infinitely strong Dyson sphere and charged it with an impossible amount of ...
	2016-06-22: Planck's Constant and The Origin of Quantum Mechanics 03:19: And so an object made of jiggling charged particles, like electrons and protons, glows.
	2016-03-30: Pulsar Starquakes Make Fast Radio Bursts? + Challenge Winners! 04:21: ... and helium nuclei, the other common charged particles hanging around the universe at this time, have much smaller ...
	2015-10-15: 5 REAL Possibilities for Interstellar Travel 05:28: Annihilate a proton and an antiproton, and you get charged pions moving at near light speed.
	2015-08-19: Do Events Inside Black Holes Happen? 11:17: ... rotating black holes, charged black holes, black hole evaporation, what goes on around black holes, ...

49 result(s) shown.

Help · About · Index