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Apr
6
comment Why is $\phi$ constant in the hyperbolic Lorentz transforms?
I make that point in my question and it doesn't follow from that that $\phi$ doesn't depend on the two spacetime co-ordinates being studied.
Apr
6
comment Why is $\phi$ constant in the hyperbolic Lorentz transforms?
Thank you. Can the analogy between Euclidean and Minkowski space (specifically, the transformations) be made more rigorous? For instance, this question I asked on MSE seemed to indicate that there's not much geometric analogy to be made between hyperobolic and usual trigonometric functions, which makes me dubious of such analogies.
Apr
6
comment Why is $\phi$ constant in the hyperbolic Lorentz transforms?
Part of my problem may arise from assuming that the only reason for $(1),(2)$ is $(*)$: I don't know whether that assumption is correct.
Apr
6
asked Why is $\phi$ constant in the hyperbolic Lorentz transforms?
Apr
5
accepted Relative angular velocity and acceleration
Mar
25
comment Relative angular velocity and acceleration
@ja72 Yes, here, although I'm less sure that my interpretation of $\alpha$ as a cross product is correct.
Mar
25
asked Relative angular velocity and acceleration
Feb
2
revised Do we have magnetic monopole? Is charge, according to yesterdays paper on Nature by Ray-Roukokoski-Kandel-Möttönen-Hall (30.01.14) quantized?
Corrected link rot.
Feb
2
suggested suggested edit on Do we have magnetic monopole? Is charge, according to yesterdays paper on Nature by Ray-Roukokoski-Kandel-Möttönen-Hall (30.01.14) quantized?
Jan
1
answered Initial pressure of explosion
Jan
1
asked How close together must air molecules be to bounce off one another?
Nov
14
awarded  Popular Question
Oct
5
comment What IS reflection?
Why is it that in specular reflection, all wavelengths are reflected, whereas in diffuse reflection, absorption of some wavelengths occurs before emission, so that only some wavelengths are reflective? I assume it's because the final sentence of your last comment does not occur readily in rough surfaces (why?).
Oct
3
comment Whose reference frame to use for $d \theta$ near a black hole?
@BenCrowell by the way, am I actually able to use the SM if the satellites are orbiting (I ask as it's not accurate if the black hole itself is rotating)?
Sep
30
comment Whose reference frame to use for $d \theta$ near a black hole?
Do you have a link detailing this thoroughly (ideally without tensors or similar wizardry)? I've got most of my information from Wheeler's introductory 'Black Holes', and whilst it's brilliant in getting intuition, it's often not very rigorous.
Sep
30
accepted Whose reference frame to use for $d \theta$ near a black hole?
Sep
30
comment Whose reference frame to use for $d \theta$ near a black hole?
I meant it to be transverse. Thank you, this was one of the problems I was having earlier. I'm trying to deduce the difference in the time signals between being sent by GPS satellites and Earthlings receiving them.
Sep
30
comment Whose reference frame to use for $d \theta$ near a black hole?
I was careless with pasting the second equation. I realise that $c=1$ is useful, but haven't been doing GR long enough to really feel at ease with it.
Sep
30
revised Whose reference frame to use for $d \theta$ near a black hole?
deleted 3 characters in body
Sep
29
asked Whose reference frame to use for $d \theta$ near a black hole?