Recent questions in Relativity physics

+26 votes

0 answers

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

asked Apr 20, 2023 in Relativity physics by hunter

+3 votes

0 answers

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

asked Apr 19, 2023 in Relativity physics by SeraphicMystic

+94 votes

0 answers

Is it possible to build a hyperloop or a warp drive that can take us from one place to another faster than light speed (FTL)? How would it work, according to physics laws as we understand them today?

asked Apr 18, 2023 in Relativity physics by diceyricey

+83 votes

0 answers

Does every part of a rotating object move with the same speed (instantaneous speed)?

asked Apr 17, 2023 in Relativity physics by noakesalfie

+857 votes

0 answers

Why was the General Theory of relativity not accepted initially?

asked Apr 17, 2023 in Relativity physics by seaj

+19 votes

0 answers

Why are people looking for quantum gravity? Do they not understand general relativity?

asked Apr 17, 2023 in Relativity physics by Ashley54321

+213 votes

0 answers

How can you determine the speed of an object without using a laser beam or other method involving light?

asked Apr 17, 2023 in Relativity physics by DMA1

+13 votes

0 answers

Who has done the best job of explaining the defects of Einstein's theories of relativity to non-scientists?

asked Apr 16, 2023 in Relativity physics by Nas

+110 votes

0 answers

Is there any physical quantity which is not relative?

asked Apr 16, 2023 in Relativity physics by Red Star Boats

+23 votes

0 answers

Why isn’t E=MC2 called a fact instead of a theory?

asked Apr 16, 2023 in Relativity physics by JSF

+1.2k votes

0 answers

Does what is E=MC2 prove the fourth dimension?

asked Apr 16, 2023 in Relativity physics by heatyman

+1 vote

0 answers

Do you feel that time is going by faster in 2019 than in 2018?

asked Apr 16, 2023 in Relativity physics by mlawson

+20 votes

0 answers

How long is a light-year in seconds?

asked Apr 15, 2023 in Relativity physics by RH

+171 votes

0 answers

What is the fastest thing in the universe? Is it light or space?

asked Apr 15, 2023 in Relativity physics by Kiaora oap

+2 votes

0 answers

Is the Michelson-Morley experiment flawed, as the light is emitted in a moving frame (surface of Earth), not a stationary frame? Hence it is incapable by design to detect the aether?

asked Apr 15, 2023 in Relativity physics by Ilfordjedi

+24 votes

0 answers

How is momentum related to the equation E=mc^2?

asked Apr 14, 2023 in Relativity physics by AstralHarmony

0 votes

0 answers

If galaxies are really light years away, how can we see them?

asked Apr 14, 2023 in Relativity physics by Mikexx

+17 votes

0 answers

What is the speed of sound? Can we ever reach that speed with our cars, planes or spacecrafts?

asked Apr 13, 2023 in Relativity physics by LuminousDreamer (2.2k points)

+214 votes

0 answers

What happens to visible light when it travels too far without hitting something like an object or a planet/star etc.?

asked Apr 13, 2023 in Relativity physics by Muiz

+18 votes

0 answers

Based on Einstein's spacetime concept, it has been claimed that nothing can travel faster than light. Is this really a plausible conclusion, or is it mostly based on hypotheses?

asked Apr 13, 2023 in Relativity physics by OnlyLew

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