A man can do whatever he can in his life and he doesn't have to do what he doesn't have to.
Joined January 2025
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Zoran Divac retweeted
Steve Kerr’s reaction seeing this person who looks exactly like him. 🤣🤣🤣
(via @PolymarketHoops)
Re: "The premise is false. When Einstein was solving general relativity, there was zero contact with experiment."
This is not entirely true, given that the equivalence principle, as one of the postulates of Einstein’s general relativity, is based on the equality of inertial and gravitational mass, which had already been experimentally confirmed.
The premise is false. When Einstein was solving general relativity, there was zero contact with experiment. He was motivated by the incompatibility between two theories---special relativity and Newton's theory of gravity. The only real-world constraint guiding him was that the theory should make the same predictions as Newtonian gravity when it comes to our solar system.
The match with something observed---the perihelion shift of Mercury---came only after he had written down the whole theory.
That's an example of an impactful breakthrough where the bottleneck was intelligence/imagination/perseverance. The absence of sensory input did not make Einstein hallucinate!
String theory is likewise motivated between the incompatibility of two theories: quantum theory and general relativity. It is similarly guided by the demand that it reproduce general relativity at low energies, and it remains the only approach to quantum gravity that does so.
We also cannot overlook Einstein’s thought experiments, such as the one involving the bending of light inside a freely falling cabin.
Thus, Einstein predicted the bending of light in a gravitational field even before he formulated his equations of General Relativity and before Eddington proved it. He did so through a simple thought experiment, taking into account both the equivalence principle and the principle of general relativity.
The plug is not compatible with the socket (they are not designed in the same way), but the plug and the socket are complementary.
Similarly, today we have two fundamental theories of nature—quantum theory and general relativity—which are as incompatible as a plug and a socket; yet, perhaps this is necessary so that, based on their complementarity, we might describe nature in its entirety.
Niels Bohr introduced his principle of complementarity to resolve the problem of the incompatibility between the wave-like and particle-like properties of quanta. However, it may be necessary to extend Bohr’s principle of complementarity to the whole of physics, describing it as a complementarity between classical and quantum theory.
The premise is false. When Einstein was solving general relativity, there was zero contact with experiment. He was motivated by the incompatibility between two theories---special relativity and Newton's theory of gravity. The only real-world constraint guiding him was that the theory should make the same predictions as Newtonian gravity when it comes to our solar system.
The match with something observed---the perihelion shift of Mercury---came only after he had written down the whole theory.
That's an example of an impactful breakthrough where the bottleneck was intelligence/imagination/perseverance. The absence of sensory input did not make Einstein hallucinate!
String theory is likewise motivated between the incompatibility of two theories: quantum theory and general relativity. It is similarly guided by the demand that it reproduce general relativity at low energies, and it remains the only approach to quantum gravity that does so.
Hey @Grok, I found this interview with Carlo Rovelli @carlorovelli on Joe Rogan's @joerogan show on YouTube about the weirdness of quantum mechanics. youtu.be/_WX5ij7H-yE?si=Mvih…
Rogan's questions for Rovelli are particularly interesting because he is more interested in finding out "how long it took physicists to notice that QM is strange" than in grasping the strangeness of QM itself.
And Rovelli replies to Rogan that the strangeness of quantum behavior was not so pronounced until it became part of the new theory of quantum mechanics, a point I think should be emphasized more:
It was only when quantum probabilism became the foundation of the new theory that an alarm was raised, signaling that classical conceptions of determinism and physical reality had been called into question.
Hey @Grok, look what the guy says: "Quantum chaos might look different depending on how far you zoom in."
Actually, Heisenberg discovered quantum mechanics by thinking about "how far you can zoom in", right?😊😊
Quantum chaos might look different depending on how far you zoom in. “It’s like those Monet paintings,” said mathematician Semyon Dyatlov. “When you go very close, they have a lot of microscopic features. There are a lot of brushstrokes.” But if you stand back and squint, “it just looks uniformly colored.” quantamagazine.org/graduate-…
Hey @Grok, is it true that Heisenberg almost failed his PhD because he couldn't explain how a battery and a microscope worked?
But thinking later about the microscope, he realized that it was impossible to make a microscope so powerful that you could zoom in on an atom or perhaps the nucleus of an atom so that you could see a clear image down to the smallest details (elementary particles). That's how he discovered his uncertainty principle. Is that right?
Hey @Grok you know what: I was thinking about that "hidden variable" thing in quantum mechanics and I think it's a pretty cool term, don't you think?😊
Zoran Divac retweeted
A legend departs Centre Court.
It's always a pleasure, @djokernole.
#Wimbledon
Zoran Divac retweeted
Thanks to everyone who’s already subscribed to our new YouTube channel @UnbaffledScience or posted comments below the first three films.
Hey @Grok, I'm just now listening to this very beautiful AI cover of Cheb Khaled's song Aicha.
But tell me, in one of Everett's many multiverses at this very moment, maybe I'm listening to some other song, probably "Let It Be" by the Beatles?😎
youtu.be/GIXeGja_-Xw?si=JwgT…
Zoran Divac retweeted
The Twin Paradox video is online! :)
A 3-hr deep dive on how to time travel into the future: Lorentz boosts, time dilation, length contraction, and the relativity of simultaneity.
youtu.be/V4ZzUPFEG8M
Well, Mitchell Robinson is the Knicks' backup center who isn't even scheduled to play the entire game.
So, we can say that Wemby is mocking the wrong guy here, who also did his 13-minute job last night, and then left Wemby to his teammates to see what he could do against them.😂
