Question

light enters from air to glass having refractive index 1.50. what is the speed of light in the glass? ​

Answer 1

R.I.=(Speed of light in glass/Speed of light in air)

Use this

Answer 2

Answer:

Refractive index of a medium (nm) = Speed of light in vacuum/Speed of light in the medium

Speed of light in vacuum (c) = 3 × 108 m/s

Refractive index of glass (ng) = 1.50

Speed of light in the glass (v) = Speed of light in vacuum/ Refractive index of glass

= c/ng

=3 × 108/1.50 = 2x 108 ms-1.