Famous Faster Than Speed Of Light In Water 2023. Web at warp 37 (a fraction of the speed of light of 0.9999… until there are 37 nines after the decimal point), odenwald calculates that the trip across the universe would last 0.2 seconds. Web in water the speed of light is slower than it is in vacuum.

The refractive index of water is approximately 1.33. By special relativity the speed of light is constant. Web to calculate the speed of light in water using the formula above, we need to substitute the values for the speed of light in a vacuum and the refractive index of water.