The speed of light in water is 2.25×108m/s. If the speed of light in vacuum be 3.00×108m/s, calculate the refractive index of water.

Speed of light in vacuum = 3.00×108m/s Speed of light in water = 2.23×108m/s

Refractive index of water = speed of light in vacuum/speed of light in water Refractive index of water = 1.33