Recent questions and answers in Relativity physics

+142 votes

0 answers

In the muon experiment, it is said that the muon observes the atmosphere as length contracted. But the entire universe would be length contracted according to the muon! How is this possible? Are time dilation and length contraction illusions of SR?

answered May 24, 2023 in Relativity physics by Stugadget

+21 votes

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Why does time slow down and not warp like light in the presence of gravity?

answered May 23, 2023 in Relativity physics by Frutbunn

+45 votes

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How does a photon of light accelerate to the speed of light without expending any energy to do so?

answered May 23, 2023 in Relativity physics by Lord Mucky

+282 votes

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How long does light take to attain full speed?

answered May 23, 2023 in Relativity physics by LunarWhisper

+6 votes

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Is it true if you go faster than the speed of light around the earth in the opposite direction of the earth's rotation you can go back in time?

answered May 21, 2023 in Relativity physics by RadiantBreeze

+14 votes

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Was Einstein's understanding that Light Speed is relative to the Observer the very first tentative understanding of the Observer Effect, and therefore not a valid description of generalised unobserved behaviour?

answered May 21, 2023 in Relativity physics by AstralWhirl

+219 votes

0 answers

How long will it take to travel 4 light years?

answered May 20, 2023 in Relativity physics by Andy W

+24 votes

0 answers

What's so special about Special relativity? E=mc^2 is nothing but Kinetic Energy (K=mv^2/2) applied to subatomic particles moving at (or very close to) the speed of light.

answered May 20, 2023 in Relativity physics by Steve da Geez

+11 votes

0 answers

What are some examples of movies that show time dilation?

answered May 20, 2023 in Relativity physics by Sjr120

+4 votes

0 answers

Why is the speed of sound constant for all mediums?

answered May 19, 2023 in Relativity physics by ukmgranger

+9 votes

0 answers

What is the correlation of relativity and time dilation?

asked May 18, 2023 in Relativity physics by LarryH

+16 votes

0 answers

Considering there are so many issues with Einstein theories were many components of his ideas on physics have been disproven, does this mean faster than light travel could be possible?

asked May 18, 2023 in Relativity physics by SolarisTwilight

+6 votes

0 answers

Does velocity slow as you approach the event horizon of a black hole as a result of time dilation from the intense gravitational forces?

asked May 17, 2023 in Relativity physics by MCH

+14 votes

0 answers

Twins A and B depart from triplet X in opposite directions and at the same speed, reaching space stations C and D equidistant from X with synchronized clocks. Does A’s clock run slower than B’s clock according to special relativity and vice versa?

answered May 17, 2023 in Relativity physics by EmberHorizon

+18 votes

0 answers

What if you had a rope tied between Earth and Mars and someone pulled it on Earth, would you feel the pull immediately on Mars? I know a message can't travel faster than light, but why in this case?

answered May 16, 2023 in Relativity physics by shekhar

+19 votes

0 answers

Was there anything wrong with Newton's Law of Universal gravitation? How did Einstein's theory of relativity fix it?

answered May 15, 2023 in Relativity physics by QuantumNova

+25 votes

0 answers

Why is there light on Earth but not in space?

answered May 13, 2023 in Relativity physics by SolarisAlchemy

+28 votes

0 answers

What is the connection between inertia and time dilation according to Einstein's theory of general relativity (in the absence of gravity)?

asked May 10, 2023 in Relativity physics by NovaMystic

+26 votes

0 answers

What would an object moving at light speed (say a starship) look like to a stationary observer?

answered Apr 25, 2023 in Relativity physics by Rick1632

+3 votes

0 answers

Could the black hole at the center of the Earth be used for faster-than-light space travel?

answered Apr 23, 2023 in Relativity physics by QuantumHorizon

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Recent questions and answers in Relativity physics

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