Q10 of 84 Page 322

The refractive index of water is 1.33 and the speed of light in air 3 × 108 ms–1. Calculate the speed of light in water.

Given that;

Refractive index (μ) = 1.33 ;


Speed of light in air(c) = 3 x 108;


Speed of light in water =?


We know that



⇒


⇒


⇒ v= 2.25 × 108m/s.


Hence speed of light in water is 2.25 × 108m/s.


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