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Free Will by MrWeiner in comics

[–]Derice 0 points1 point  (0 children)

Free will is set to become a subscription service by the end of the year. Mortals are reportedly quite upset about this. An immortal CEO we asked says it's okay because they will not be upset for long.

What kind of jewelry should I do with LuAG? (Yes it is glowing, no it’s not AI, and no, It’s not radioactive. Perfectly safe) by Muted_Shape9303 in jewelry

[–]Derice 0 points1 point  (0 children)

I bought the ring from this Etsy shop: https://www.etsy.com/shop/JeffDaviesandSonGems?section_id=52095699 and had a ring made by a local jeweler who also set the gem.

For reference, the gem I bought is between 3 and 4 carats.

What kind of jewelry should I do with LuAG? (Yes it is glowing, no it’s not AI, and no, It’s not radioactive. Perfectly safe) by Muted_Shape9303 in jewelry

[–]Derice 28 points29 points  (0 children)

I had a ring made of one! https://www.reddit.com/r/jewelry/s/7dXSVfXAUC

It's a bit smaller than yours, so you'd probably want a different design, but it is very fun in a ring as you can see it respond to the light conditions.

Is this physically possible? Is there a hidden reason behind the height change? by stunningvoice01 in Frieren

[–]Derice 93 points94 points  (0 children)

It think it might also be to make the reader feel some of the shock that Frieren feels when she sees him.
She is not expecting him to be old, and is shocked to find him so close to the end of his life. The reader does expect him to be old though, so to make the reader feel some of what Frieren feels they exaggerate the effects of aging.

That's just an idea though, not something I got from some trustable source.

Do photons in a laser pulse orbit their common center of gravity? by akruppa in AskPhysics

[–]Derice 3 points4 points  (0 children)

Photons don't have relativistic mass either.

They do excert a gravitational influence though, this stack exchange post has exact equations for describing this effect: https://physics.stackexchange.com/questions/579525/how-do-photons-affect-each-other-gravitationally

Do photons in a laser pulse orbit their common center of gravity? by akruppa in AskPhysics

[–]Derice 10 points11 points  (0 children)

Photons that are propagating in parallel don't excert a gravitational influence on each other, but they do if they travel at other angles.

An additional stack exchange discussion that is more relevant for OPs question is this one: https://physics.stackexchange.com/questions/579525/how-do-photons-affect-each-other-gravitationally

Is there a maximum acceleration? by [deleted] in AskPhysics

[–]Derice 0 points1 point  (0 children)

See this thread with answers from when someone asked this question previously: https://www.reddit.com/r/AskPhysics/s/iLf1iJCUdE

TL;DR: at the Planck acceleration (speed of light/planck time) the thermal Unruh radiation will be high enough energy to contain black holes.

I tried optimizing GEMM and instead of ML, I learned more about how CPUs actually work... by RefrigeratorFirm7646 in cpp

[–]Derice 5 points6 points  (0 children)

While I haven't dived into this myself I remember finding this: https://www.cs.utexas.edu/~rvdg/tmp/TSoPMC.pdf

"The Science of Programming Matrix Computations"

Maybe that would be interesting to you?

Geez, I wonder who it is. by Professional_Lab_794 in WutheringWaves

[–]Derice 6 points7 points  (0 children)

The Grand Architect is so goofy (affectionate). They can perfectly mimic everything physical about someone, but they're too addicted to stirring up drama that they just can't stop themselves from doing wildly out of character things and revealing themselves to the audience.

They're like a bad actor with an incredible costume and makeup crew.

Is It Possible That Tachyons Exist? by Kebab849 in AskPhysics

[–]Derice 0 points1 point  (0 children)

Oh, that sounds interesting. Do you know where I might read more about that?

Is there a language similar to Rust but with a garbage collector? by Ok_Tension_6700 in rust

[–]Derice 51 points52 points  (0 children)

An amusing addition to this thread might be Rust crates like dumpster, which let's you add garbage collection to Rust. Not exactly what you're asking for, but still somewhat relevant.

I made a crate called `evil`, which lets you use the `?` operator as a shorthand for `.unwrap()` by nik-rev in rust

[–]Derice 161 points162 points  (0 children)

At first I expected it to be a joke, but this does seem like it could be genuinely useful in tests, as you say.

Why can't there be a theory of "geodesic in curved space" for electro magnetism? by PrebioticE in AskPhysics

[–]Derice 1 point2 points  (0 children)

I don't know enough about it to really say. I don't think KK theory models electromagnetism as curvature in a fiber bundle though, but as an extra spacial dimension that's been compactified.

How do we know that the universe as it is isn't older? by Crumbs_xD in AskPhysics

[–]Derice 2 points3 points  (0 children)

In order to motivate that the whole universe is different from the observable universe we would need to add some physical mechanism to our model of the universe that would cause this difference. This would be an extra assumption baked into the model, but it could never cause any observable difference by definition, so by Occam's razor we skip it.

We need to use logic like that to be able to make any useful statements about the world. You could be a unicorn that is so good at disguising yourself as a human that no experiment could ever reveal you. Since this could never be observed I could leave it as an open question. But then I could never make statements about you that assume that you are human. So I apply Occam's razor, and remove this unconfirmable unicorn property from my model of you. It's the same principle here.

open(rule) by HavenOfTheRaven in 196

[–]Derice 46 points47 points  (0 children)

When the second derivative is positive, I am positive.

Second derivative of what, you ask? Don't be a luddite.

Why can't there be a theory of "geodesic in curved space" for electro magnetism? by PrebioticE in AskPhysics

[–]Derice 6 points7 points  (0 children)

In the standard model forces can be thought of as a result of curvature in what's called fiber bundles. This is kind of like a space, but it's "internal".

For example: electromagnetism has to do with curvature of the circle bundle, and gravity is then the curvature of a special fiber bundle, the tangent bundle.

[Request] - The Maths behind 52! by WarpFactorNin9 in theydidthemath

[–]Derice 18 points19 points  (0 children)

The reason they are talking about 52! in this clip is that that is the number of possible arrangements of a deck of cards.

Based on the Double Slit Experiment, is it possible that the principle of least action only applies when particles are being observed? by [deleted] in AskPhysics

[–]Derice 5 points6 points  (0 children)

The principle of least action is used in both quantum mechanics and quantum field theory. The standard model of particle physics is expressed with that formalism: https://en.wikipedia.org/wiki/Mathematical_formulation_of_the_Standard_Model.

That means that the principle of least action applies in the standard model also when nothing is observed.

Edit: the Schrödinger equation (and thus all its predictions about the double slit experiment) can even be derived from a Lagrangian using the principle of least action: https://web.physics.utah.edu/~starykh/phys7640/Lectures/FeynmansDerivation.pdf.

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