Question

speed of light in a material is 5/6 of the speed of light in vacuum. find the refractive index of the material​

Answer 1

Answer:

Speed of light in vaccum , C = 3*10^8 m/s

Speed of in a material, V = 5/6 * 3*10^8 m/s

Refractive index, n = v/c

                               = 5/6 * 3*10^8 m/s / 3*10^8  m/s

                               = 5/6

                           n  = 0.833