Question

Light enters from air to glass having reflective index 1.50. What is the speed of light in glass? The speed of light in vacuum is 3*10 to the power 8

Answer 1

Answer:

The spedd of light in glass = 2×10^8 m/s

Explanation:

Refractive index = speed of light in air / speed of light in medium

1.50 = 3×10^8 / s

1.50s = 3×10^8

s = 300000000/1.50

( to divide multiply by 100) s = 30000000000/150

s = 200000000 = 2×10^8

Therefore, the speed of light in glass will be 2×10^8 m/s.

Hope this answer is helpful to you!!!!!!

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.