User:JustSomeGuyWithOutAPhysicsDegree/speedoflight

Olaus Roemer first successfully measured the speed of light in 1676.

Known facts about Light (Photons): Light slows down entering a medium like o2 or glass.  Light speed's up entering vacuum.  Light is E.  Light is acted upon by gravity. C = 299792458 m/s

We now have all the information we need to work out why light moves at the speed it do's: First if Light can slow down and speed up we know C is not fixed. Now consider that light speeds up entering a vacuum. Hence Light must have a motive force. If light has a motive force able to providing Acceleration and space is empty(no friction) then Light would Acceleration to ∞. Since we know that light has a cruising speed of C and not ∞, we know space is not empty. If space is not empty then light must be suffering drag. If light is suffering drag then we know now that the value of C is a photons terminal velocity in the medium of space, in normal conditions.

Why light moves at all: We know that gravity works on all E. We know that gravity is spreed out across all the connected mass of an object. Since a photon is the small'st unit of E/M found to humans then it is all so getting the most force to mass of any known particle. Since the friction of space is very small photons go very fast. 299792458 m/s under normal conditions in fact.

Things that will change the speed of a photon. Gravity mostly. Gravity will accelerate or slow down a photon depending on where the mass is relative to the photon. The speed of C is the Gravity of the photon, as it nears mass the mass of the other object starts acting on it. As C is the terminal velocity of the photon's own Gravity and Gravity is a week force and we know that pushing through terminal velocity is very hard a photons speed will not change much. But it will change. Heading toward a black hole, that's going to make a difarance. Lastly hitting something. I don't need to explain that do I?.