Akshat

good morning to only inertial observers

@ayushphy Landau independently derived this equation

Most people don’t know, but this is also called the Landau–Raychaudhuri equation. I’m currently down a rabbit hole why is it called that? Let me know if you know 😅

@gopal_lohar_0 @shreyadoesstuff You're right, it's 10⁸⁰ or something, see this is why I don't do good with these big numbers.

@star_stufff @shreyadoesstuff Nope, it's like equal to number of atoms in a bacterium.

sorry..... HOW MUCH?!!???!??!?!!?!??!??

@CatAstro_Piyush Yesssir

@star_stufff Are waah

Have started working on my first QFT video btw, watch this space :)

@stringking42069 Bro

@star_stufff Onlyfans exclusive?

@anvita_gauri 🥳🥳

@star_stufff yayyy

@TradeTexasBig Thank you!

@star_stufff Good luck

@cosmicfibretion Way faster imo

Here's a bright fucking idea: maybe if we didn't spend hundreds of billions of dollars on waging endless wars, physics would progress far faster?

@gabrielmjonk Perturbations of the electromagnetic field?

I think I found that one paper that will help me finish the last section of my paper on *an* electromagnetized (a test field here) Kerr BH.

@curiouswavefn If only he had not skipped those math classes at the Zurich Polytechnic

Einstein did a simple thought experiment applying the equivalence principle to light in which he clearly demonstrated that the path of a light beam in an accelerated gravitational frame will be curved (this is demonstrated very nicely in Susskind's GR book). But after that came the hard part - figuring out the math that would describe this phenomenon. It took Marcel Grossmann's help with Riemannian geometry and tensors and Einstein's uncanny feel for invariants and general covariance that helped him achieve the end results after several painstaking attempts and dead ends.

When Hilbert space and Weyl tensor meet..

Extremely rare footage of David Hilbert and Hermann Weyl. Randomly popped on my YouTube feed. youtu.be/gVosjjoy1MI?si…

@TomuVoid hmm you have a point, but that would be 8 🤔

@star_stufff ok yes true but when he puts sunglasses on then how many

is gojo with glasses an 8 eyes or 12 eyes. DISCUSS

@stringking42069 @DeivonDrago 😭😭 never giving up tho!

@DeivonDrago FFS can a hep-th bro win ONE FUQQING TIME JUST ONCE?!?!?!?!?!?!?!?!

Alas.

Absolutely, maybe we would have discovered it very late when particle physics was emerging. People like Feynman would have certainly described gravitational interaction in terms of graviton exchange. The geometric description really required someone like him with that solid imagination. The key was the equivalence principle throughout!

Dirac once said that special relativity would have been discovered very soon if Einstein had not done so, but general relativity would have taken a very long time (although Hilbert came close - he got much of the math right but lacked Einstein's profound physical intuition and thought experiments).

@stargazingdad Best wishes, Eric!

I was 45 when I decided to take up physics as a hobby four years ago. It has since become my passion. Aside from work and family, most of my time is spent reading books and watching videos of varying difficulty. (learning math, too 🤪) I quickly realized just how little I know. Without the mathematical expertise, I’m missing the bigger picture. I’m doing everything I can to change that. It’s proven to be both very challenging and rewarding. I need to be humble enough to recognize my limits. I must acknowledge when my understanding is limited to my experience and skill set. That’s why I follow professionals like @martinmbauer and @NikoSarcevic. They don’t have to be here and engage, but I’m grateful they're doing it. They are kind enough to discuss physics so openly. Therefore, I am respectful and kind in my responses. That’s the whole point of science: working through problems together, collaborating, discussing, and figuring out the best way to find answers. We can only do that through respectful conversations. Professional physicists are my lifeline when I find myself in trouble. I know enough to get myself into trouble, but not nearly enough to get myself out of it, which is why I rely on physicists. A little humility, grace, and gratitude will go a long way.

@vrundasays_ It has to do with the geometrical structures on null hypersurfaces (such as black hole horizon). You might wanna check out Arjun Bagchi's papers

I've been coming across many papers regarding carrollian geometry recently 🤔 curious about reading this