Recent questions in Speed of Light

+153 votes

0 answers

What are the exceptions to Einstein's theory that nothing can travel faster than the speed of light in vacuum?

asked May 18, 2023 in Speed of Light by EnchantedJester

+4 votes

0 answers

What happens when two photons (or light beams) in space travel in opposite directions? What if two objects with some mass travel in opposite direction say a little over half of the speed of light? Do they travel faster than speed of light?

asked May 18, 2023 in Speed of Light by Bungo63

+51 votes

0 answers

Since light takes time to travel, how long ago would it be if I looked at Earth from Pluto?

asked May 18, 2023 in Speed of Light by Harry Stottle

+11 votes

0 answers

What happens when a person travels near or past the speed of light for an extended period of time? Would his age start slowing down as well since he's technically traveling faster than time itself?

asked May 17, 2023 in Speed of Light by CrystalTwilight

+14 votes

0 answers

Does a photon instantaneously gain the speed of light or do they accelerate from 0?

asked May 17, 2023 in Speed of Light by Ross mcmahon

+3 votes

0 answers

How far away is the Andromeda Galaxy at this moment? Everything says 2.5 million LY. But that’s how far the light has travelled. The Galaxy has been getting closer for those 2.5 million years. How far has it traveled since the light was emitted?

asked May 17, 2023 in Speed of Light by building control

+211 votes

0 answers

Could time travel to the past be possible if people were travelling through space at light speed using relativity theory?

asked May 17, 2023 in Speed of Light by CrystalHarmony

+7 votes

0 answers

If we could compress a magnet to the size of an atom, would it have enough energy to reach the speed of light?

asked May 17, 2023 in Speed of Light by Derek McWilliams

+24 votes

0 answers

What is the maximum possible mass that can be moved at the speed of light?

asked May 16, 2023 in Speed of Light by Georgio56941 (2.2k points)

+111 votes

0 answers

In a 500m race, A beats B by 25m or 5s. What is the speed of A?

asked May 16, 2023 in Speed of Light by DAG1983

+6 votes

0 answers

How many years is 20 light years?

asked May 16, 2023 in Speed of Light by anew spark

+20 votes

0 answers

How does the speed of light compare to the speed of other objects in space (like planets and stars)?

asked May 15, 2023 in Speed of Light by okocala

+24 votes

0 answers

Does a drop in the frequency of light occur over a sufficiently large enough distance as a result of expanding space?

asked May 15, 2023 in Speed of Light by Dusty_Bin

+40 votes

0 answers

Can a black hole move faster than light? If a black hole is moving faster than the speed of light, what happens to it as space continues to expand around it at super-luminal speeds?

asked May 15, 2023 in Speed of Light by tryin it all myself

+967 votes

0 answers

Are there any flaws in Einstein’s principle of relativity and his idea about the speed limit of light?

asked May 15, 2023 in Speed of Light by Wheeler DIYer

+6 votes

0 answers

How can the speed of light be the same in different media even though their wavelengths depend on the medium (e.g., water)?

asked May 15, 2023 in Speed of Light by Brian_L

+20 votes

0 answers

Is it possible to fold space-time? Would that allow for faster than light speeds?

asked May 15, 2023 in Speed of Light by Tim-mersey

+22 votes

0 answers

How might electroids behave at the speed of light?

asked May 14, 2023 in Speed of Light by tricky13

+14 votes

0 answers

How can it be proven that time dilation happens when we move near the speed of light?

asked May 14, 2023 in Speed of Light by xednim

+16 votes

0 answers

What is more difficult to achieve, faster-than-light (FTL) travel or time travel?

asked May 14, 2023 in Speed of Light by StellarEnigma

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