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haruspex
reacted to
OmCheeto's post
in the thread
How does tire pressure affect distance travelled by a bicycle coasting to a stop?
with
Like
.
Beings that I used to be an avid bicyclist in my youth, I was really interested in the OP's question. What I did not expect to find was...
1 minute ago
PeroK
reacted to
Orodruin's post
in the thread
I
Spacetime interval and basic properties of light
with
Like
.
Physics in the end is about describing how things work. I can propose any wild theory I want by definition. That will however most...
2 minutes ago
PeroK
reacted to
strangerep's post
in the thread
I
Spacetime interval and basic properties of light
with
Informative
.
He started from the "Relativity Principle" (RP): the laws of physics are identical in all inertial (nonaccelerating) frames, and the...
2 minutes ago
PeroK
reacted to
Ibix's post
in the thread
I
Spacetime interval and basic properties of light
with
Like
.
Well, your last thread was attempting to understand properties of curved spacetimes without knowing anything about flat spacetime. I'd...
3 minutes ago
Orodruin
replied to the thread
I
Spacetime interval and basic properties of light
.
Pythagoras’ theorem is a theorem in Euclidean space. Spacetime is not Euclidean, it is Minkowski space. In Minkowski space, the...
5 minutes ago
PeroK
reacted to
HansH's post
in the thread
I
Spacetime interval and basic properties of light
with
Skeptical
.
How did Einstein himself start? I assume with the fact that the speed of light is constant for all observers. and that results in...
7 minutes ago
PeroK
replied to the thread
I
Spacetime interval and basic properties of light
.
If you consult any decent textbook on SR, all this will be explained. I like Helliwell's book...
7 minutes ago
Orodruin
replied to the thread
I
Spacetime interval and basic properties of light
.
No, then you are misunderstanding my post. You can perfectly well start with a definition. It is not at all the case that you will...
7 minutes ago
H
HansH
replied to the thread
I
Spacetime interval and basic properties of light
.
you mean this? but then it would mean that according to pythagoras ds^2=dx^2+ct^2 which is a different equation. so then I am confused.
10 minutes ago
PeroK
reacted to
HansH's post
in the thread
I
Spacetime interval and basic properties of light
with
Skeptical
.
While not having a professional physics background I was still interested in knowing more about special and general relativity...
12 minutes ago
PeroK
reacted to
Ibix's post
in the thread
I
Expansion of space
with
Like
.
Yes and no. It's just microwave radiation and totally undistinguished in some senses. However, it's black body radiation at a very...
16 minutes ago
PeterDonis
replied to the thread
I
Spacetime interval and basic properties of light
.
Your line segments are labeled wrong in your "moving frame" diagrams. ##ds## is the invariant length of the line segment that is...
18 minutes ago
H
HansH
replied to the thread
I
Spacetime interval and basic properties of light
.
based on 'start with how things work ' I come to the logical sequence of understanding as follows:
25 minutes ago
H
HansH
replied to the thread
I
Spacetime interval and basic properties of light
.
This is exactly what I mean. so you cannot start with a definition but should start with how things work and then the definition is the...
27 minutes ago
OmCheeto
replied to the thread
How does tire pressure affect distance travelled by a bicycle coasting to a stop?
.
Beings that I used to be an avid bicyclist in my youth, I was really interested in the OP's question. What I did not expect to find was...
27 minutes ago
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