How much time passed for the passenger traveling with at speed-of-light spaceship?
35597
How long would it take me to travel to a distant star?
31825
Why are objects at rest in motion through spacetime at the speed of light?
86328
What is the relative speed of two near-light speed particles headed towards each other?
91385
Does quantum mechanics allow faster than light (FTL) travel?
47242
Time dilation due to change in speed
974
Speed of light in a gravitational field?
100690
Does superluminal travel imply travelling back in time?
8367
What do physicists mean when they say "speed of light"?
85108
Find the speed of a jet given the time of travel back and forth
64226
If traveling at the speed of lights stops time, why does it take light 8 minutes to reach Earth?
115786
Speed of gravitational waves and light
124977
What is the speed of sound in space?
147202
Would approaching a distant star at near the speed of light unfold its entire history in "fast-forward"?
13786
A question in Special Relativity
57773
About the speed of light and gravity
68058
Is it possible to determine the slit a photon went through in the double slit experiment by measuring its flight time?
62039
What does a sphere moving close to the speed of light look like?