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Jan
4
comment Why the speed of light in vacuum is same in all inertial reference frames?
@Sean That video is not the whole answer. It explains how measurements made in one inertial frame relate to those made in another. It does not answer the fundamental question: Why is the speed of light constant? There is speculation about this but no answer.
Oct
5
comment Thought experiment - would you notice if you fell into a black hole?
Pure nonsense. As an example, in Specially Relativity, the dimension of an object travelling at high speed is shorten in the direction of travel. If the speed of light is local, then this would not happen.
Oct
4
comment Thought experiment - would you notice if you fell into a black hole?
@RobJeffries: I have posted my answer. You're just not accepting it. The speed of light in a vacuum is constant. A tilted light cone changes the speed of light. A narrowed light cone changes the speed of light. A widened light cone changes the speed of light. Light cones have only one shape and only one orientation. Anything else would change the speed of light.
Oct
4
comment Thought experiment - would you notice if you fell into a black hole?
@WetSavannaAnimalakaRodVance: I know the math. Nobody else seems to. The speed of light in a vacuum is constant. That means the light cones do not tilt. They do not squeeze together or spread apart. They always retain the same shape. All that changes are the isolines of time marked on them.
Jun
7
comment Thought experiment - would you notice if you fell into a black hole?
Yes, the Sun travels around the Earth. All the observations show this. All the math shows this. There's even a model that show this: <en.wikipedia.org/wiki/Antikythera_mechanism>; Just because everyone agrees, that doesn't make them correct. Light cones never tilt or change shape. They only compress or stretch.
Jun
7
awarded  Critic
Jun
7
comment Thought experiment - would you notice if you fell into a black hole?
Your diagram is wrong; light cones do not tilt. If they did, the speed of light would changed. Light cones are stretched out, that is, the isolines of constant time intervals move farther apart but the shape does not change and it does not tilt.
Jun
6
awarded  Teacher
Jun
6
answered Why the speed of light in vacuum is same in all inertial reference frames?
Mar
1
comment Double-Slit Experiment Timed
No, that's not it. I don't see anywhere in it where the particle is timed. And I don't see any reference to who did the experiment.
Mar
1
asked Double-Slit Experiment Timed
Aug
18
awarded  Student
Aug
18
asked How can black holes have gravity?
May
28
awarded  Autobiographer