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If a weak light source is attached to a string, and someone swing this light source in circle. It seems that this light source is brighter. Yes or no
It may be truly a question of life and death.
You know those glow sticks.
As a sailor it is a good idea to carry one on our lifevest.
Falling into the sea, those glow stick make a light source that ...
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How do we know that bending of light around stars is due to bending of space-time and not diffraction?
One question that popped up during the studies of special and general relativity (which I am forced to take unfortunately) is the following:
How do we know that this is due to the bending of space-...
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