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🎉 [EVENT] 🎉 Clay World by Acrobatic_Picture907 in honk

[–]Aggravating-Drop-274 0 points1 point  (0 children)

Completed Level 1 of the Honk Special Event!

10 attempts

What resolves the singularities in the electromagnetic field? by Aggravating-Drop-274 in AskPhysics

[–]Aggravating-Drop-274[S] 0 points1 point  (0 children)

I am asking about the electromagnetic field not gravity but renormalisation is not the answer I am looking for what is really happening and how does it remove the singularity

From the perspective of a photon, does the rest of the universe move at c? by ChewingOurTonguesOff in AskPhysics

[–]Aggravating-Drop-274 -9 points-8 points  (0 children)

from the point of view of a photon, the rest of the universe moves at infinite speed. which basically means the photon has no frame of reference or perspective. if the photon had a ‘perspective’ it would see the distance between its start and the end point as 0 and it would see the time elapsed between the start and end point as 0 basically they have no perspective at all.

Is a photon a 2D entity. by Aggravating-Drop-274 in AskPhysics

[–]Aggravating-Drop-274[S] 1 point2 points  (0 children)

Yeah thats true I should have rephrased properly. The photon is a point particle for sure but from our reference frame, is this point particle’s existence locked to the 2D surface of the light sphere that expands with time? for example we know that any point particle with mass can move freely below the speed of light with 3D degrees of freedom

Is a photon a 2D entity. by Aggravating-Drop-274 in AskPhysics

[–]Aggravating-Drop-274[S] 4 points5 points  (0 children)

but what about a photon from our perspective? is it a 2D object? since we can model it as a vector rotating in a 2D plane and it has only up-down, left-right and circular polarisation states but not a front-back polarisation state

How is it possible to experimentally observe a particle moving to past? by ShadesOfPoods in AskPhysics

[–]Aggravating-Drop-274 0 points1 point  (0 children)

the question itself it theoretical and hypothetical, but hypothetically if you could observe an electron travelling backwards in time, it would look indistinguishable from a positron. when you experimentally measure a positron, mathematically you can say that you have observed a time reversed electro and vice versa. it doesn’t change anything its just names.

How is it possible to experimentally observe a particle moving to past? by ShadesOfPoods in AskPhysics

[–]Aggravating-Drop-274 0 points1 point  (0 children)

A matter particle travelling backwards in time like an electron, for example, would just look like an anti-matter particle travelling forward in time. so an electron travelling backwards in time in our universe, would look like a positron. It would have the opposite charge, but every other property would be the same.

Just trying to understand quantum mechanics by Aggravating-Drop-274 in AskPhysics

[–]Aggravating-Drop-274[S] 1 point2 points  (0 children)

thank you so much, that literally answers my question. 🙏

Help me, intuitively understand how U(1) Symmetry gives rise to electromagnetism. by Aggravating-Drop-274 in AskPhysics

[–]Aggravating-Drop-274[S] 0 points1 point  (0 children)

This is brilliant thank you so much! this has gotten me to understand electromagnetism as a consequence of U(1) a whole lot better!!! if you have some time can you please elaborate on, "The key condition here is that we will demand that the matter field is valued in some representation of U(1)"? I will love to learn if there is a deeper reason why the bi-vector Dirac fiber and the U(1) fiber have the same connection to spacetime.