Question

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Q. 2. Light enters from air to glass having refractive index 1.50. What is
speed of light in glass ? Speed of light in vacuum is 8 x 108 m 8-1.
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Answer 1

Answer:

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your answer is here !

Explanation:

Refractive Index = Speed of light in vaccum/speed of light in medium

1.5 = 3×10^8/speed of light in glass

Speed of light in glass

= (3×10^8)/1.5

= 2× 10^8 m/s

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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.