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#theoretical physics
pinkmoon-fox · 2 days
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17.4.
Last exam done! and i already know i passed the one from friday(theoretical electrodynamics). sadly not a good grade but that was to be expected, just happy i wont have to take the lecture again 🥲
the new semester already started on monday, i have to catch up on the lecture i missed yesterday. but had my first computational physics lecture today and it was really nice! looking forward to this :>>
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greenouillee · 4 months
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Problem: Maths (& Physics) have too many cases where a symbol is used, confusingly, to mean multiple different things, leading to ambiguity and headaches. Sensible solution: Use a key or just simply clarify the meaning in context, so v here is velocity, or v here is an arbitrary vector, or v here is specifically final velocity, or v here is the harmonic function for the complex part of a complex function f(z) for the purposes of the Cauchy-Riemann & Laplacian equations, or v here is the potential V(x) differentiated with respect to time (yes i have seen this once, it was disgusting). My solution: add new characters. invent new scripts. steal syllabaries, acquire abjads, and abduct alphabets until we have enough squiggly lines to give literally everything its own unique symbol. This will help nobody and ruin everything. I will not rest until I am doing theoretical physics with these bad boys:
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[Image ID: The 120 base Sitelen Pona of Toki Pona. They are simple, black and white, cartoonish, almost child-like drawings that act as logographic characters for the base words of the conlang Toki Pona. Each one has its corresponding name/word in Latin script beneath. End ID] Thank you for coming to my TED Talk.
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amberschmamber · 10 months
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Hey sorry, your boyfriend is a single chain polymer now. Just jiggling happily... no he still has not equilibrated yet. sorry
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paper-mario-wiki · 5 months
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I've got a question to someone more Mathematically Learned than me:
What is the current Edge Of Human Knowledge in regards to the origins and fundamentals of the natural world? What's the current thread that most people are trying to follow to get down to like. The exact reason for the nature of the universe? I've heard that in the first second directly after the big bang, things were quote "a little weird," unquote. And I want to know what that means. I'd like to know what gaps in our knowledge of physics we are most focused on trying to fill right now.
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pratchettquotes · 30 days
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Ponder knew he should have never let Ridcully look at the invisible writings. Wasn't it a basic principle never to let your employer know what it is you actually do all day?
But no matter what precautions you took, sooner or later the boss was bound to come in and poke around and say things like, "Is this where you work, then?" and "I thought I sent a memo out about people bringing in potted plants," and "What d'you call that thing with the keyboard?"
And this had been particularly problematical for Ponder, because reading the invisible writings was a delicate and meticulous job, suited to the kind of temperament that follows Grand Prix Continental Drift and keeps bonsai mountains as a hobby or even drives a Volvo. It needed painstaking care. It needed a mind that could enjoy doing jigsaw puzzles in a dark room. It did not need Mustrum Ridcully.
Terry Pratchett, The Last Continent
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relativelymargo2511 · 9 months
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will you be the particle to my antiparticle *lip bite* (physics rizz)
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spacejax · 6 months
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physics doctorate…. singing its siren song 2 me….
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noosphe-re · 9 months
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The Penrose diagram for the formation and evaporation of a Schwarzschild black hole including annihilation and entanglement transfer at the singularity—in this figure we also explicitly show the transfer of entanglement from the particles at the singularity and the particles outside the event horizon. A Hawking pair is created on the Cauchy surface Σ an and evolves to the surface Σ d where the ‘int’ Hawking particle has now reached the singularity at r = 0. Another Hawking pair is created at Σ b and evolves to finally reach the Cauchy surface Σ g where the ‘int’ particle is at the singularity. Now the two ‘int’ particles are both at the singularity where they are forced to interact with (for example) two entangled matter particles as shown in figure 3(c). Consider the following three particular wavy lines: the black wavy line at r = 0 between Σ d and Σ g , the blue wavy line between the green particle at the singularity on Σ d and the black particle on Σ g , and the red wavy line between the green particle at the singularity in Σ g and the black particle on Σ g , these wave lines represent the dynamics of figure 3(c). In the Penrose spacetime diagram. Finally, assuming full annihilation of the two green particles at the singularity, which happens for ω″ = ω′ = ω, we end up with two ‘out’ entangled particles on Σfin. (Akil, Ali & Dahlsten, Oscar & Modesto, Leonardo. (2021). Conditional entanglement transfer via black holes: restoring predictability. New Journal of Physics. 23. 10.1088/1367-2630/ac17bb.)
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kaleysian · 2 months
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I went to a lecture by Dr. Arturo Pianzola on Applications of Galois Cohomology to Infinite Dimensional Lie Theory. Such a fascinating piece of research!
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fatchance · 3 months
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"Dante, too, encountered the greatest difficulty, in the form of three fierce wild beasts, before he had even crossed the fateful threshold of the Inferno. Like any traveler, he knew that the first step, abandoning the familiar paths, is the most difficult."
Carlo Rovelli, in White Holes, 2023.
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amberschmamber · 5 months
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"Theory is haunted"
-"What?"
-cocks gun: "Theory is haunted"
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unimatrix-420 · 1 year
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TBBT | S 10 E 4
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art-of-mathematics · 1 year
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My wobbly torus-vortex wire model
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I crafted this tiny wire model back in 2013. It's built of copper wire.
this shape has a very interesting handling - it wobbles, it's still merely stable, but it's still very flexible.
Back in 2013 this was how I imagined an elementary particle's coiled 'string' (partially relates to string theory).
Now look at the wobbly model when shaken:
(The notes in the background are some stuff that might be partially related.)
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aspaceinthecosmos · 3 months
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Hello hello! I was wondering if you could explain to me about black stars? (Sorry if this comes off as bossy!) It's just that I read in a book that they're the stars that are on the brink of dying and someone else (whom I do not think is that much of a reliable source) says they don't exist or that they're black holes, I would not be inclined to believe them, but books *do* get outdated so.. thank you so much if you can satiate my curiosity!
hello anon! i’d never heard of black stars before, so i did a bit of research. something important to note with this information is that i couldn’t find an article or study more recent than 2013, and with how fast astrophysics and cosmology have been changing, it’s likely that these are out of date, so take everything stated here with a grain of salt.
from my understanding, black stars are a theoretical alternative to black holes, utilizing semiclassical general relativity, as opposed to classical general relativity which says that black holes should exist.
the main study i was reading had a bunch of jargon i couldn’t fully understand, but seemingly, the main difference between black stars and black holes are that black stars don’t have to have an event horizon (in a black hole, the event horizon is the “point of no return,” or the point at which the escape velocity is so high it surpasses the speed of light).
another thing i read was that black stars don’t/wouldn’t have a singularity. this would be caused by quantum processes within the star creating degeneracy pressure (think: pressure between subatomic particles), which would prevent the particles within the star from occupying the same point in space and forming a singularity. this lack of a singularity would make it so light can escape the black star, but would be extremely warped and redshifted. this would solve the question of how information can be destroyed in black holes, but again, is very theoretical.
black stars could also be an in-between phase between a red supergiant and it’s collapse into singularity (forming a black hole), which may have been what you were referring to by saying “stars on the brink of dying.”
i would, however, take this all with a grain of salt as i mentioned earlier. these studies are from over 10 years ago, and a lot has changed since then (including actually imaging black holes!), which, as black stars seem to be an alternative to black holes given some inconsistencies in our knowledge, the fact that we’ve imaged black holes makes it more unlikely that they’re real.
i hope that answered your question, if not, feel free to comment or send another ask :)
sources:
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pratchettquotes · 8 months
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"But hold on," said Tiffany. "Won't I be you one day? And then will I talk to me now, as it were?"
"Yes, but the you that you talk to won't exactly be you. I'm very sorry about this, but I am having to talk about time travel in a language that can't really account for it. But in short, Tiffany, according to the elasticated string theory, throughout the rest of time, somewhere an old Tiffany will be talking to a young Tiffany, and the fascinating thing is that every time they do, they will be a little different. When you meet your younger self, you will tell her what you think she needs to know."
Terry Pratchett, I Shall Wear Midnight
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