Quantum Gravity and the Hardest Problem in Physics | Space Time
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Published 2018-09-20
Between them, general relativity and quantum mechanics seem to describe all of observable reality.
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How Much Information is in the Universe?
Ā Ā Ā ā¢Ā HowĀ MuchĀ InformationĀ isĀ inĀ theĀ Universe?Ā Ā
Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Luke Maroldi
Assistant Editing and Sound Design by Mike Petrow
Made by Kornhaber Brown (www.kornhaberbrown.com)
The first few decades of the 20th century was a time of miracles for physics. First, Einsteinās relativity utterly changed the way we think about space, time, motion and gravity. Then the quantum revolution of the 20s and 30s overturned all of our intuitions about the subatomic world. Together, general relativity and quantum mechanics have allowed us to explain nearly every fundamental phenomenon observed, and have predicted many unexpected phenomena that have since been verified. And yet the two theories contradict each other in fundamental ways. In the century since that golden era of physics, weāve been trying to reconcile the two ā¦ without success. But today on space-time Iām going to begin our discussion of the great quest for this union ā the quest for a theory of quantum gravity, and for a theory of everything.
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All Comments (21)
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You know an equation is hard when it includes pitchforks and sweating letters
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Police man : You were speeding, do you know how fast you were driving? Heisenberg: No but I know exactly where I am Police man: You were driving 100mph Heisenberg: Great, now I am lost.
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Well that was bloody spectacular. As a layman who has been avidly reading content on the subject for almost four decades, this is the first time I have ever caught a true, clear glimpse of some of the finer details in the incompatibility problem between General Relativity and Quantum Mechanics, and this is making me feel all warm and fuzzy inside, like I have just gained a bit of super cool insight. Thank you.
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Beginning: cool i understand Middle: hold on- End: what is an e l e c t r o n?
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I can't even put into words how high quality this content is. Or how amazed I am that I'm learning it for free. You guys are absolutely incredible.
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"The non-renormalizability of quantized general relativity is connected to the idea that precisely localised particles produce black holes." That's a great pickup line
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This guy is a terrific host. He explains/behaves in a way that keeps you interested and understanding. Charisma. Lots of other people would be robotic and boring reading the script.
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Every other sentence has me daydreaming about something new. Very thought provoking and I end up missing something else. I gotta keep rewinding to catch what I miss. So much information at a high speed. Fantastic!
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1:32 I understood that graphic!
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"How much information does the universe contain?" I'm still trying to figure out how much information this video contains. I'm sure both figures are far beyond my standard measurements.
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Donāt take this the wrong way but these are really the best videos on youtube to fall asleep too. Matt has such a nice and easy way of talking that itās really calming. Thanks for the many well rested nights.
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It is so fascinating that, with measurement and mathematical logic, humans are able to access the nature of our universe.
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The hardest problem in physics is why gravity acts 10x stronger when your alarm goes off at 7amš¤
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2:15 When he says "space-time" and you're worried the video is about to end
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This channel has taught and motivated me more than my 12 yrs of school. I appreciate it a lot.
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My new goal is to one day understand this video completely
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10:22 "Brought back to reality," oh there goes gravity.
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I understood about a planck length worth of this stuff.
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Y'all sleeping on the fact that this man spoke for 16 continuous minutes about quantum mechanics and general relativity without stuttering.
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My parents told me if I studied perturbation I'd go blind.
