So I saw the movie Interstellar, and it got me thinking. I won't even mention all the plot holes, but I wanted to ask about a planet orbiting a black hole. I always thought you had to travel near the speed of light in order to experience time dilation.
- If you pointed a strong telescope at people on the planet's surface, will you see them moving very slowly?
- Since photons do not experience time dilation and always move at the same speed, will the surface of that planet and objects appear darker, almost dim and black?
- When a photon is absorbed by an atom on the surface and then discharged and reflected back, is the atom's electron orbital speed slower with respect to the speed of light, and absorption also slower with respect to the speed of light?
- Would more light hit a radiometer per unit time from the radiometer's perspective, and would it cause it to spin faster or slower (radiometer time, revolutions/s)? Wouldn't there be a build up of 'light pressure' because atoms could not absorb and reflect the photons as quickly?