Question

Light enter from air to glass having a refractive index 1.50. What is the speed of light in glass? The speed of light in vacuum is 3*10 to the 8

Answer 1

Answer

Given

Speed of light in vacuum = 3×10^8 m/s

refractive index = 1.50

We know that

retractive index = $\rm \frac{Speed\:of\:light\:in\:vacuum}{Speed\:of\:light\:in\:given\:medium}$

=> 1.5 = $\rm \frac{3×10^8}{Speed\:of\:light\:in\:glass}$

=> $\rm Speed \:of \:light \:in\: given \:glass = \frac{3×10^8}{1.5}$

=> $\rm Speed \:of \:light\: in\: given \:glass = 2 × 10^8 m/s$

Answer 2

Hey Buddy ❤

Your Answer -

Given :

Speed of light in vacuum, c = 3 × 10^8 m/s

Refractive index of glass = 1.50

Formula :

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

Solution :

Speed of light in the glass

= Speed of light in vacuum/ Refractive index of glass

=3 × 10^8/1.50

= 2x 10^8 ms-1

Glad To Help :D

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