All Questions
14
questions
3
votes
4
answers
835
views
Gravitational Time Dilation and the Apparent Speed of Light
It has been proven that time far away from Earth is faster than time on the surface of Earth, due to gravitational time dilation. (GPS satellites take gravitational time dilation to account.)
Would ...
- 141
0
votes
1
answer
76
views
Is it more accurate to say space in a weaker gravitational field is contracted, or that time is faster?
Little thought experiment. An observer places a mirror and a clock 1 lightyear away from a black hole. He then goes in the black hole's gravitational field at a point where he sees the clock tick at 2 ...
- 171
0
votes
1
answer
41
views
What could a year long journey look like, while traveling near the speed of light, through the lens of that telescope?
Hypothetically speaking if you had a satellite going near the speed of light in a straight line towards an exoplanet light years away and that satellite had a telescope pointed at the surface of an ...
0
votes
2
answers
61
views
Can Shapiro Time Delay cause light in a vacuum to go faster than c as viewed from a remote reference frame?
I know within any reference frame the speed of light is fixed. But it has been shown that light does appear to slow down when passing massive objects as viewed from a remote reference frame per https:/...
- 319
4
votes
3
answers
2k
views
How to prove that time stops at the speed of light using general relativity in a flat spacetime?
I know from special relativity that $t'=t/\sqrt{1-(v/c)^2}$, where t is proper time. I see from this equation that for each second of t, t' grows bigger and eventually reaches infinity as v goes to $...
- 61
1
vote
2
answers
274
views
Time and speed of light in Relativity
Time running slower near a massive object, but the speed of light does not really change near a massive object, according to Relativity - it just curves. Is not time directly related to the speed of ...
- 103
0
votes
1
answer
86
views
Time dilation from inside gravity well
If I were on the planet from interstellar where 1 hour = 7 years on earth and I had a super-powerful telescope and looked back at our galaxy, would I see the earth revolving around the sun at a super-...
-1
votes
3
answers
123
views
A question on special relativity
Imagine yourself inside a moving spaceship at velocity v(non zero velocity)
Now imagine yourself holding a glass in your hand and you drop it. Now say after 5 sec the glass hits the floor and breaks. ...
- 658
1
vote
1
answer
57
views
Does the effect of gravity get slower at high speeds?
If a sentient object was vibrating at near light speed and was some distance off the ground. Compared to being relatively stationary to the ground, would it take a longer while for them to fall down ...
- 2,650
-1
votes
2
answers
103
views
A thought experiment about time dilation
Suppose you are on am infinitely long train traveling on tracks and an atmosphere that has no resistance whatsoever. No this train is traveling at fractionally below the speed of light, and you are on ...
- 79
2
votes
1
answer
141
views
Why is light affected by time dilations in space-time curvatures
My previous question on this site gave me an answer to what affects light - space warping or time warping. The answer is- both. But what now doesn't make sense to me is why light is affected by time ...
77
votes
9
answers
19k
views
If the speed of light is constant, why can't it escape a black hole?
When speed is the path traveled in a given time and the path is constant, as it is for $c$, why can't light escape a black hole?
It may take a long time to happen but shouldn't there be some light ...
- 1,289
0
votes
1
answer
171
views
Does physics recognize the particle of light separately from the wave of light? [closed]
To frame this question, we need to assume that time freezes when traveling at the speed of light. This is theoretically congruent with Einstein's theory of relativity and the theory of time dilation, ...
- 125
0
votes
4
answers
265
views
Would infinite time elapse relative to an outside observer if an object was completely at rest?
Here's my reasoning... time dilation due to velocity: t'=t√(1-v^2) v expressed as a % of the speed of light. If you are moving through distance at the speed of light, to an observer at rest relative ...
- 490