Question

the speed of light in air is 3*10^8ms.Calculate the speed of light in glass.The refractive index of glass is 1.5​

Answer 1

Refractive index, n =1.5

speed of light in glass, v =?

speed of light in vacuum, c = 3*10'8 m/s

n=c/v

v=c/n

v=3*10'8/1.5=2*10'8m/s

Answer 2

Step-by-step explanation:

The refractive index of a medium a with respect to vacuum is n=c/v (where c is the speed if light in vaciuum and v is the speed of light in medium a .

.Here, n=1.5 , c=3 * 10^8 .(n is the refractive index of medium glass with respect to vacuum.)