Recent questions in Speed of Light

+6 votes

0 answers

Light moves slower in more dense mediums, so does it accelerate when it enters a less dense medium (such as from water to air)? If so, what is this mechanism?

asked Jun 20, 2022 in Speed of Light by Asheashe

+281 votes

0 answers

How did Einstein get to know that the speed limit of the universe is the speed of light?

asked Jun 19, 2022 in Speed of Light by deanomc

+10 votes

0 answers

Since light has speed, would it have to accelerate, and hence cannot be constant?

asked Jun 19, 2022 in Speed of Light by bigfranky145

0 votes

0 answers

How can two observers who are moving relative to each other at different speeds come up with the same result for both measurements (e.g. length)?

asked Jun 19, 2022 in Speed of Light by ChrisMK

+227 votes

0 answers

Why is the fact that GPS satellite clocks run slower proof of time dilation and not proof that the speed of light changes when it travels parallel to a gravity source?

asked Jun 19, 2022 in Speed of Light by SolarisOracle

+46 votes

0 answers

How long would it take for a mass driver to accelerate from zero to the speed of light?

asked Jun 18, 2022 in Speed of Light by AstralMystic

+12 votes

0 answers

If something is traveling at or close to the speed of light, would it be able to see other objects moving slowly from its perspective (or vice versa)?

asked Jun 17, 2022 in Speed of Light by TheHouseThatJackBuil

+212 votes

0 answers

How can a beam of light travel around the Earth roughly 7 times in a second and a neutron star can supposedly rotate 1,000 times in a second? Wouldn’t the rotational speed of the neutron star exceed the speed of light?

asked Jun 17, 2022 in Speed of Light by StellarHarmony

+54 votes

0 answers

How do we know the speed of light is constant?

asked Jun 17, 2022 in Speed of Light by Iona.top.tenement

+38 votes

0 answers

How come we can see further into space each year if the speed of light is constant?

asked Jun 17, 2022 in Speed of Light by QuantumHorizon

+16 votes

0 answers

Would a theoretical warp drive circumvent the relative time differences caused by "faster than light" travel to distant stars?

asked Jun 17, 2022 in Speed of Light by CosmicVortex

+319 votes

0 answers

How did Einstein discover that the speed of light is constant, regardless of the speed of the observer?

asked Jun 16, 2022 in Speed of Light by Jarveye

+7 votes

0 answers

What is the difference between light traveling at different speeds in different directions?

asked Jun 16, 2022 in Speed of Light by RadiantOracle

+208 votes

0 answers

How is the speed of light measured? Does it travel at different speeds through space and time according to its destination and source?

asked Jun 16, 2022 in Speed of Light by drilly

+120 votes

0 answers

How do I calculate a light year?

asked Jun 16, 2022 in Speed of Light by GoodwithWood

+17 votes

0 answers

What is the speed of electricity compared to light and sound?

asked Jun 15, 2022 in Speed of Light by LunarFlare

+23 votes

0 answers

Is it possible for spaceships to travel many times the speed of light like those depicted in Star Wars or Star Trek?

asked Jun 15, 2022 in Speed of Light by Mr right first time

+454 votes

0 answers

How does traveling at a speed close to the speed of light violate Einstein's theory of relativity?

asked Jun 15, 2022 in Speed of Light by DaveyC

+190 votes

0 answers

How did scientists react when they found out that particles could travel faster than the speed of light?

asked Jun 14, 2022 in Speed of Light by Big Dunk

+21 votes

0 answers

Is travelling at the speed of light possible? If not, what are some other speeds that might enable time travel within a reasonable distance of earth (say thousands rather than millions of years)?

asked Jun 14, 2022 in Speed of Light by Chrispy83

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