(a) The refractive index of glass is 1.5. What is the speed of light in glass? `("Speed of light in vacuum is "3.0 xx 10^(8) m s^(-1))`
(b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

Options

A. `5xx10^(-9)ms^(-1)`
B. `5xx10^(8)m//s`
C. `2xx10^(8)m//s`
D. `2xx10^(-8)m//s`

Answer

C

Explanation

For answer see Physics Darpan, Part-2, Section-B, Exercises of Textbook example no. 10.3