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 vacuum is 3 x 10^8 ms-1.

Answer:

Given parameters

Speed of light in vacuum (c) = 3 × 108 ms-1

Refractive index of glass (ng) = 1.50

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

Refractive index of glass = Speed of light in vacuum/Speed of light in the glass

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

v = c/ng

v = (3 × 108)/1.50

v = 2 × 108 ms-1

5 Comments

  1. Nic answer

  2. Very helpful, keep it up

  3. Very help ful answer, made the question easy

  4. Awesome brilliant I understood the answer perfectly. It’s very good
    Good answers
    No doubt and query

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