Question

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

Answer 1

Answer:2*10raise to power 8 m/sec.

Explanation:n21=V1/V2

1.5=3*10raise to power 8 m/sec/V2

After Solving,

V2=2

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.