let's see if anyone can answer the question of why c (lightspeed) a universal unyealding constant does not violate the laws of thermodynamics - especially entropy from what energy source do free photons in space draw the limitless power to travel at 299792458 m/s and no other speed? what causes the apparent optical illusion of light slowing down 25% to 225000000 m/s in a tank of water - apparently losing energy (since c is constant it must be an illusion after all) and returning to 299792458 m/s upon leaving the tank? (apparently gaining energy) what causes electromagnetic signals to slow down due to gravitational drag especially since gravity is supposed to propagate at lightspeed (since c is a constant this must be an illusion as well) why is light not able to escape a black hole? if lightspeed is a constant and gravity propagates at the speed of light why should light be stopped or slowed by gravity? causing it to be blue or red shifted if light is a wave how does it propagate in a vacuum? if light is a particle, why does it behave like a wave, causing interference patterns in Thomas Young's double slit experiment ? if a laser injected a single precisely perpendicular pulse between 2 parallel mirrors (assuming one mirror was a 2 way mirror) would the beam reflect for infinity at the speed of light - producing a perpetual floating light beam? (according to entropy the beam must lose energy) why does light travelling through a transparent solid cause the solid to heat up? as if the light were losing energy to the solid if light (a photon) has no mass how can it push a solar sail?