
20220727: How Many States Of Matter Are There?
 03:29: A state of matter defines how these various average properties relate to each other.
 03:34: It defines what we call the equation of state.


20220427: How the Higgs Mechanism Give Things Mass
 05:24: ... isospin and hypercharge are tightly coupled, and their combination defines electric charge. Is it time to give up on this symmetry ...


20220330: Could The Universe Be Inside A Black Hole?
 03:48: In a sense geodesics form the grid that defines the fabric of spacetime.


20220323: Where Is The Center of The Universe?
 08:41: They’re the grid that defines the fabric of space time in general relativity, and correspond to the paths followed by light.


20220316: What If Charge is NOT Fundamental?
 05:50: The conservation of fundamental properties defines which interactions are possible and which are impossible.


20220210: The Nature of Space and Time AMA
 00:03: ... over time okay the scale factor increases some imaginary grid that defines what point in space is expands over time so that sense the the points ...


20210721: How Magnetism Shapes The Universe
 05:03: This is the heliopause, the boundary of the heliosphere, which defines the limit of the Sun’s influence in the galaxy.


20210707: Electrons DO NOT Spin
 12:44: ... results in profound differences in their behavior  it defines how they interact with each other. Bosons, for example, are able ...


20210623: How Quantum Entanglement Creates Entropy
 13:09: ... world from the quantum. And, as an extra trick, it also defines the arrow of time which itself points in the direction ...


20210616: Can Space Be Infinitely Divided?
 01:16: ... in quantum mechanics  it’s a fundamental constant of nature that defines the scale of the ...
 05:08: ... in momentum. But it turns out that the Planck constant defines a new source of quantum uncertainty that you can’t ever ...


20210609: Are We Running Out of Space Above Earth?
 15:24: But the planck mass defines the mass of a black hole one Planck length in radius, and remember, black holes are massive!


20201118: The Arrow of Time and How to Reverse It
 01:21: ... episode exploring why this breaking of time symmetry on the cosmic scale defines the experience of time that we experience in our own ...


20201020: Is The Future Predetermined By Quantum Mechanics?
 06:34: A fast moving observer defines the present very differently to you.
 08:55: Each such web defines a set of properties of the universe correlated with some prior quantum decision.


20201013: Do the Past and Future Exist?
 10:19: ... space beneath their future light cones defines all possible defines all possible definitions of the past to them. Just ...


20200630: Dissolving an Event Horizon
 14:17: ... but they also have something called an interaction crosssection, which defines the probability of another particle interacting with the electron as a ...


20200428: Space Time Livestream: Ask Matt Anything
 00:00: ... particular location in either the universe all the quantum multiverse defines what we see and so it's very important to take into account yeah I ...


20200316: How Do Quantum States Manifest In The Classical World?
 01:48: ... dead cat  aren’t properties of the atoms. Rather, the information that defines these classical properties exists in the fantastically complex network ...
 05:32: ... spin of one particle  say the electron  my choice of measurement basis defines the spin of the positron. If I measure the electron in the vertical ...
 17:40: ... to one possible result of that measurement. And the wavefunction itself defines the probability of a given branch "collapsing". The Many Worlds ...


20200224: How Decoherence Splits The Quantum Multiverse
 01:52: ... described by this wavefunction thing  it’s the mathematical object that defines the distribution of possible outcomes if you were to try to make a ...


20200218: Does Consciousness Influence Quantum Mechanics?
 02:58: That probability wave defines the location of the electron at any point IF you try to measure it.


20191209: The Doomsday Argument
 01:48: ... a quick refresher: the cosmological constant defines the amount of dark energy, which is the stuff causing the expansion of ...


20191118: Can You Observe a Typical Universe?
 10:08: ... it he defines, although doesn’t invent, the selfsampling assumption, which states that ...


20191007: Black Hole Harmonics
 03:22: ... called the fundamental mode – it’s usually the strongest or loudest, and defines the note – middlec, fsharp, whatever  played by that ...


20190606: The Alchemy of Neutron Star Collisions
 00:34: ... by the number of protons in the nucleus neutron number is variable and defines the isotope of the elements the rprocess produces only Neutron rich ...


20190509: Why Quantum Computing Requires Quantum Cryptography
 04:58: Polarization defines the direction that its electric and magnetic fields … wave.


20190410: The Holographic Universe Explained
 08:05: A nice feature is that the changing the length of the strand – which defines the energy in the bond – doesn’t change the basic physics.


20190403: The Edge of an Infinite Universe
 01:22: To review: the particle horizon defines the limit of the visible past, and there’s also cosmic event horizon defining the limit of the visible future.


20190130: Perpetual Motion From Negative Mass?
 01:34: This is encapsulated in Newton’s second law, which defines the connection between the amount of force applied and the acceleration that results.
 03:08: ... actually pretty mysterious that the same property that defines the response to gravity also defines resistance to acceleration by all ...
 06:36: ... and more, change the geometry of spacetime and that new geometry defines the paths objects can ...


20181018: What are the Strings in String Theory?
 06:22: These resonant frequencies depend on the length of the string, also its tension, which defines wave velocity and so relates frequency to wavelength.
 07:17: String length defines mass, but also defines which complex vibrational modes are possible.


20181003: How to Detect Extra Dimensions
 08:14: ... fact, the 3brane itself, which defines the threedimensional structure on which our observable universe exists, ...


20180920: Quantum Gravity and the Hardest Problem in Physics
 06:37: The uncertainty principle also defines the precision tradeoff between time and energy.


20180815: Quantum Theory's Most Incredible Prediction
 07:51: And the sum of the infinite possible interactions defines the strength of the one real interaction.


20180725: Reversing Entropy with Maxwell's Demon
 04:06: ... defines how far a system is from thermal equilibrium, and it also defines the ...


20180718: The Misunderstood Nature of Entropy
 06:58: The average distribution of individual particles in phase space defines the thermodynamic properties of the system.
 08:49: So the macrostate that defines thermodynamic equilibrium is, by definition, the one with the most microstates, which also means the maximum entropy.


20180523: Why Quantum Information is Never Destroyed
 02:50: That would mean that the exact configuration of the universe at any point in time defines the exact configuration at any other point.


20180404: The Unruh Effect
 02:26: ... light ray world lines backwards from our observer defines what we call the past light cone, the region of spacetime that can have ...


20180315: Hawking Radiation
 04:18: Horizons cut off access to certain modes of the quantum fields, disturbing the balance that defines the vacuum.


20171220: Extinction by GammaRay Burst
 08:26: It's the star's rotational axis that defines the direction of the jet.


20171019: The Nature of Nothing
 05:45: This restriction defines the range of the fundamental forces.


20170928: Are the Fundamental Constants Changing?
 02:54: ... speed of light defines the relationship between space and time, so is it even meaningful to ...


20170920: The Future of Space Telescopes
 05:19: ... diffraction limit defines the best possible resolution of a telescope, and it gets smaller or ...


20170830: White Holes
 09:29: This law defines the direction of the flow of time.


20170707: Feynman's Infinite Quantum Paths
 01:27: ... but as a wave that fills the intervening space interacts with itself and defines the probability of that particle actually showing up at a given point on ...


20170517: Martian Evolution
 11:55: I don't feel like it defines me.


20170405: Telescopes on the Moon
 02:20: ... sensitivity, but when you're in space or on the moon, aperture size defines image ...
 02:34: The diffraction limit defines the smallest resolution a telescope can achieve and is inversely proportional to diameter.


20170202: The Geometry of Causality
 02:35: But we want that intuition because, more than proper time, the spacetime interval defines the flow of causality.
 09:40: In fact, the nearest downhill contour defines the forward light cone for anyone anywhere on the spacetime diagram.


20161208: What Happens at the Event Horizon?
 02:37: ... area encompassed by the socalled lightlike paths defines all future events or spacetime locations that we could potentially ...
 02:54: Our past light cone defines the region of the past universe that could potentially have influenced us.
 15:11: ... the wave does have a definite position at all times and that position defines its future ...


20161130: Pilot Wave Theory and Quantum Realism
 00:55: ... are both waves and particles at the same time, the act of observation defines reality, cats are both alive and dead, or even that the universe is ...
 04:45: The wave defines a set of possible trajectories and the particle takes one of those trajectories.


20160810: How the Quantum Eraser Rewrites the Past
 09:50: Perhaps the evolving tapestry of entanglement in all its impossible complexity is what really defines reality in this space time.


20160706: Juno to Reveal Jupiter's Violent Past
 00:50: In fact, its effect during the first billion years of the solar system's formation defines the positions of all planetary orbits.


20160622: Planck's Constant and The Origin of Quantum Mechanics
 00:03: ... episode is supported by "The Great Courses Plus." The Planck constant defines the size scale at which the familiar physics of our macroscopic reality ...
 01:54: So it also sort of defines a pixel scale to reality.
 01:59: In many ways, it defines the divisibility of the quantum world.
 03:37: This average frequency defines the color that we see.


20160615: The Strange Universe of Gravitational Lensing
 12:16: The wave function that we calculate defines the probability that we will observe a particular set of physical properties.


20160601: Is Quantum Tunneling Faster than Light?
 01:46: This de Broglie Wavelength defines how well determined an object's position is.


20160413: Will the Universe Expand Forever?
 01:50: And it defines the shape, the curvature, of spacetime.


20160330: Pulsar Starquakes Make Fast Radio Bursts? + Challenge Winners!
 04:10: By the way, the number that defines the size of the circle for electrons is called the Thomson scattering crosssection.


20160127: The Origin of Matter and Time
 06:10: What defines that local time flow?
 09:01: But what defines the direction of the flow of time?


20160113: When Time Breaks Down
 07:48: And what defines its direction?


20151209: How to Build a Black Hole
 03:09: And it defines the volume that can be occupied by the strange matter in a neutron star.


20150930: What Happens At The Edge Of The Universe?
 00:20: The universe defines all of space and time that exists.
