All Questions
11
questions
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votes
0
answers
38
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Looking back to Earth via general relativity [duplicate]
Based on Eddington experiment proving the effect of gravity on light, would it be conceivable that some light emitted from our sun bounce back on earth and continued in the universe. During this ...
1
vote
0
answers
27
views
About the gravity field around a lightbeam [duplicate]
Imagine there is an infinitely long beam of light. It has impulse and energy. How it affects the spacetime surrounding it? Will masses be pulled towards it perpendiculary and pulled in the parallel ...
3
votes
4
answers
491
views
Why is it said that, because gravity can bend light, that this entails a curvature of space-time?
Why can't gravity affect light directly without any reference to space-time?
How does light bending show that space-time is curved?
I would have thought that it shows that massless particles are ...
- 65
4
votes
4
answers
239
views
If a light beam is sent tangent across earth would it curve at 9.8 $\rm m/s^2$? [closed]
Just to see if my understanding of the curvature of light is correct.
- 361
1
vote
1
answer
108
views
Energy spacetime warping
If energy warps spacetime, then does light warp spacetime?
And if special relativity says that things near the speed of light increase in relativistic mass, then does light have a relativistic mass?
...
- 21
3
votes
1
answer
85
views
Does bending the direction of light generate space curvature?
When light passes a mass, the light path is bent due to the curvature of space caused by the object mass. Is there an inverse effect of bending a light path to cause an effect of generating a level of ...
- 39
2
votes
1
answer
413
views
Space-time curvature VS light diffraction
Thanks to YouTube suggestions I saw some videos.
One is about the bright spot in the middle of a coin shadow, which is called the Poisson spot, that is related to light diffraction. (https://youtu....
- 121
3
votes
3
answers
162
views
A star with its radius not much larger than its Schwarzschild radius
I was asked about the question today:
suppose that you are observing from afar a spherically symmetric star of mass $M$. Its radius $R$ is $\textbf{not}$ much larger than its Schwarzschild radius. ...
- 63
2
votes
2
answers
102
views
Light escaping from stars despite their mass?
"Light is deflected by powerful gravity, not because of its mass (light has no mass) but because gravity has curved the space that light travels through."
If the Mass of the Sun is so great, how is ...
- 23
4
votes
3
answers
2k
views
Do gravitational waves affect light?
Gravity "bends" light, predicted with theory of relativity and subsequently observed: how does gravity and gravitational waves achieve this effect, and shouldn't this effect be present wherever there'...
- 189
3
votes
3
answers
607
views
How can space be euclidean when light bends?
I have read people arguing that tridimensional space sections of space time continuum (whatever its number of dimensions) appears to be euclidean from empirical evidence. I cannot reconcile it with my ...
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