Question

the speed of light in air is 3* 10^8 ms^-1. calculate the speed of light n glass. the refractive index of glass is 1.5

Answer 1

Refractive index of glass = speed of light in air / speed of light in glass
n = c/v

v = c/n
= 3 * 10^8 / 1.5
= 2 * 10^8 m/s

Speed of light in glass = 2 * 10^8 m/s

Answer 2

Answer:

2*10^8m/s

Explanation:

v=c/n

v= 3*10^8/1.5

v= 2*10^8m/s