meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 10 months |
| seen | Jul 25 '12 at 20:27 | |
| stats | profile views | 69 |
|
Jul 25 |
awarded | Cleanup |
|
Jul 25 |
revised |
Could cell-phone radiation cause cancer? rolled back to a previous revision |
|
Jul 2 |
awarded | Yearling |
|
Jul 14 |
accepted | Could cell-phone radiation cause cancer? |
|
Jul 13 |
comment |
What does a frame of reference mean in terms of manifolds? Or is the point, perhaps, that "change along the time component" doesn't really make sense (change compared to what?); so that saying "inertial" or "accelerated" makes sense only compared to another reference frame? |
|
Jul 13 |
comment |
What does a frame of reference mean in terms of manifolds? Alright, let me make sure I understand. A frame of reference at a point is a choice of a fiber in the $SO(M,g)$-bundle on $M$. This, via the connection, is equivalent locally (near our point in $M$) to a section of the $SO(M,g)$-bundle. Now, an inertial reference frame, is such a choice so that locally near our point, the frame (section) doesn't change along the time component. An accelerated reference frame is a non-inertial reference frame. Did I get that right? |
|
Jul 13 |
comment |
What does a frame of reference mean in terms of manifolds? I'm not sure I understand. You're saying that a frame of reference is a section of $(TM)^4$ (satisfying some conditions)? But then what is meant by saying that it is a frame of reference at a point? It seems that the definition that you gave is global in nature. Is this an abstraction of the phrase `frame of reference' to the point of it not being dependent on the location of the observer? I think I'm missing something basic. |
|
Jul 12 |
asked | What does a frame of reference mean in terms of manifolds? |
|
Jul 9 |
comment |
Could cell-phone radiation cause cancer? Thanks! Where can I read about multi-photon effects? (or if it's easy: what is it?) |
|
Jul 8 |
asked | Could cell-phone radiation cause cancer? |
|
Jul 8 |
accepted | Is spacetime simply connected? |
|
Jul 8 |
asked | How is the complexification of spacetime justified? |
|
Jul 8 |
asked | Is spacetime simply connected? |
|
Jul 3 |
awarded | Supporter |
|
Jul 2 |
comment |
Objects in Physics as a mathematician would see them Thanks! I apologize for not being able to upvote, but this is also a very good answer for me! |
|
Jul 2 |
awarded | Scholar |
|
Jul 2 |
accepted | Objects in Physics as a mathematician would see them |
|
Jul 2 |
comment |
Objects in Physics as a mathematician would see them This answer is very well suited for me. Thank you very much! Unfortunately, I can't upvote with my reputation... |
|
Jul 2 |
awarded | Student |
|
Jul 2 |
asked | Objects in Physics as a mathematician would see them |
