Question

Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vaccum is 3 x 10⁸ ms^-1

Answer 1

Refractive index, n_m

= _{\(\frac{\textit{Velocity of light in vaccum}}{\textit{Refractive Index of glass}}\)}

= _{\(\frac{3\times 10^8}{1.50}\)}

= 2 x 10⁸ m/s