Question

light enters form air to glass having refractive index 1.50 .(given that speed of light in vacuum is 3 * 10⁸ m/s).using given information find the speed of light in glass?

Answer 1

Refractive index of glass is given by the formula:

Refractive index of glass=Speed of light in air/Speed of light in glass

Putting the values:

1.50=3 x 10⁸/speed of light in glass

Speedof light in glass= (3 x10⁸⁾/1.50

= 2 x 10⁸ m/s