Question

speed of light in water is 3/4 th of speed of light in vaccum find the absolute refractive index

1)2/3
2)4/3
3)3/4
4)5/3

Answer 1

Hey! ! !

Mate :-

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Solution :-

Ans:- 3 ) 3/4

A/q :-

Ng = 3/2 and Hw = 4/3

Absolute refraction index of a medin

= Speed of light in vacuum / speed of light in the medium

=> Speed of light in vacuum = 3/2*2*10 power8
m/s

Speed of light in water = ( 3 × 10power8 m/s)/4/3

= 2.25 × 10 power 8 m/s

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