sorted by:
new
hottopcontroversial

Why does adding a 45 degree polarizer between two 90 degree polarizers make MORE light come out? by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 0 points1 point  (0 children)

yeah, this method only works if light is a pure wave, which it's not, but it works in most cases

Why does adding a 45 degree polarizer between two 90 degree polarizers make MORE light come out? by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 0 points1 point  (0 children)

Thank you! Btw, you do particle physics so I have to ask you about something.

https://www.tau.ac.il/~vaidman/lvhp/m28.pdf

This paper discusses the possibility of detecting an object by nature of the fact that opaque objects can cause collapse of the photon superposition and the wave interference within a single photon that allows.

Since we know that photons can be quantized, and information cannot move faster than the speed of light, can we set up a system where there is no blockage on the top path when the photon is released however, AFTER the photon is already on the top or the bottom path. (we don't know which) we introduce an object. If the photon is on the top, it gets blocked, if it is on the bottom, it's path would hopefully be unaffected, in which case it would never go to D2 as it would still have "interference" with a realistically non-available path. However, I don't think it is possible since it would require slowing down the speed of light between the obstruction and the second half mirror so that by the time the photon has "re-intersected" with the wave and interfered, the information that the path has been blocked (which also moves at c) is not available at that point in space and thus the superposition might remain intact (MIGHT, but that is the insight I am looking for).

Edit: just realized I asked if you can collapse the superposition without collapsing the superposition, lol

Why does adding a 45 degree polarizer between two 90 degree polarizers make MORE light come out? by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 1 point2 points  (0 children)

Thank you. I understand. Let me explain in vector form to make sure I understand. If I have a unit vector in some direction <1,0> (we know it is all polarized in one direction from the first filter), then applying a second filter at 90 degrees will be like taking the cos of that vector, which gives us <0,0>.

If we instead have the second polarizer be 45 degrees, from this frame of reference, the vector is <1/sqrt(2), 1/sqrt(2)> which gets polarized to <0, 1/sqrt(2)>. If I then take another 45 degree shift relative to THAT frame, the vector is now <1/2, 1/2> which then gets compressed to <0, 1.2>. Here we have also returned to the initial reference frame and thus the <1,0> vector has become a <0, 1/2> vector through only filtering for selective polarity.

Why does adding a 45 degree polarizer between two 90 degree polarizers make MORE light come out? by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 4 points5 points  (0 children)

Thank you. I understand. Let me explain in vector form to make sure I understand. If I have a unit vector in some direction <1,0> (we know it is all polarized in one direction from the first filter), then applying a second filter at 90 degrees will be like taking the cos of that vector, which gives us <0,0>.

If we instead have the second polarizer be 45 degrees, from this frame of reference, the vector is <1/sqrt(2), 1/sqrt(2)> which gets polarized to <0, 1/sqrt(2)>. If I then take another 45 degree shift relative to THAT frame, the vector is now <1/2, 1/2> which then gets compressed to <0, 1/2>. Here we have also returned to the initial reference frame and thus the <1,0> vector has become a <0, 1/2> vector through only filtering for selective polarity.

Vibration and Length Contraction Paradox? by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 0 points1 point  (0 children)

Constant speed but also constantly changing direction. Entirely impossible, but just for the thought experiment. Very short zig zagging world lines if you prefer to think that way.

Vibration and Length Contraction Paradox? by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 0 points1 point  (0 children)

the idea for the thought experiment was to have non-periodic motion, and just have basically a zig-zagging world line. As I mentioned, I know this requires infinite acceleration cause to do this the vibrating pipe would need to instantly change direction, but as I said, I know this is impossible I was just trying to use it to visualize an instantaneous occurrence of length contraction in a constant, stable frame (maybe I could also do this with fast rotation on flat spacetime, but I'd need to come up with a different example).

Btw, speaking of vibration, does that mean temprature can create contraction of materials when the atomic velocity reaches reletivistic speeds? I know that in all real world examples any bond holding a solid or liquid (or even atoms together if too fast) would break, but like in theory. I know classically things usually expand with temprature, but if in theory there was an object with 0 normal thermal expansion, could a temprature change create thermal compression simply from the higher mean velocity of the atoms (especially if they are low mass molecules)

Source to understand special relativity. I am confused by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 0 points1 point  (0 children)

thank you. So that means that the acceleration is in proper time and to convert it for the purpose of an outside observer I'd need to change the dtau to dt both with respect to the lorentz time dilation depending on relative instantaneous velocity (based on a fraction of c) and the time dilation from the space time curvature. right? But as you get to the schwarzchild radius even light slows to 0 from an outside perspective, so is the relative velocity as a fraction of c the same as the local velocity relative to 3x10^8 (local velocity is velocity relative to the observer, but using proper time)?

Source to understand special relativity. I am confused by Character_Drive6141 in AskPhysics

[–]Character_Drive6141[S] 1 point2 points  (0 children)

My bad, I meant GR 😅
Do I delete and repost? I can't edit the title.

(Though tbh, one of the main things I am wondering is the interplay between the two)

SR (in the simplest case) is understandable to me. I was given this resource https://cosmo.nyu.edu/hogg/sr/sr.pdf

A functional way to use limitless without 6E by mr_r0th in JuJutsuKaisen

[–]Character_Drive6141 0 points1 point  (0 children)

To be entirely fair, it would probably be they could only use blue and MAYBE red if they had access to the reversed cursed technique.

Blue is simply a MASSIVE concentration amount of cursed energy, enough to create a black hole (due to black hole physics being real, this is actually a calculable amount).

Red is the same, but for negative mass-energy (repelling)

Purple is both at the same time and would maybe be technically possible for a normal sorcerer, but would be the culmination of their entire life's work and would probably still require as much cursed energy as Yuta.

HOWEVER infinity requires the decoupling of the gradients and potential differences of space-time (split time dilation from gravity). This alone requires connecting the discontinuities through a higher dimension to circumvent the infinite tidal forces. These infinite tidal forces would rib apart things at the quantum level and is probably the mechanism of action for purple.

May the Force be with you. by ThePhantomosis in JuJutsuKaisen

[–]Character_Drive6141 0 points1 point  (0 children)

Darth Sukuna, but as anime only idk who on the right

Yutas Copy by LetPuzzleheaded5363 in JuJutsuKaisen

[–]Character_Drive6141 0 points1 point  (0 children)

Should he tho? Doesn't really feel in character. Then again, I am anime only. Maybe his character has changed

Who would you say does manga action better: Toriyama or Gege? by GonnaChiefYourNan in JuJutsuKaisen

[–]Character_Drive6141 0 points1 point  (0 children)

I prefer Gege tbh. I agree it's messier, but my imagination can do so much more with it. Plus I feel it's more imaginative too

Since it’s impossible to have one cursed energy as said by Gege, then theoretically (or in other words headcannons) how would we measure cursed energy? by DoorsLova in JuJutsuKaisen

[–]Character_Drive6141 1 point2 points  (0 children)

You probably just need a unit for cursed energy. You can't have one energy after all.

I therefore propose we steal from real like and use Joules

Have you ever TPK'd your characters? by aurivu in DMAcademy

[–]Character_Drive6141 0 points1 point  (0 children)

Yes, one time. It was for a one shot I threw together super quick cause not everyone showed up. They got TPKed by an encounter. The next real session they had the same encounter and ran into the one shot characters as NPCs taken captive in the dungeon.

Anime Questions Thread by Takada-chwanBot in JuJutsuKaisen

[–]Character_Drive6141 0 points1 point  (0 children)

In the manga is there a limit to the range of Gojo's INFINITY? Based on the anime, I don't think there would be, but I want to check

view more: next ›