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Question

The speed of light in water is 2.2*108​ m/s and 2*108m/s resp. What is the refractive index of water with respect to glass and glass with respect to water??

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Solution

Dear student

Refractive index (of a water wrt air)= speed of light in air/speed of light in medium=c/v1
Refractive index (of a glass wrt air)= speed of light in air/speed of light in medium=c/v2

so, ​Refractive index (of a glass wrt water)= speed of light in water/speed of light in glass=2.2*108/2*108​ =1.1
so, ​Refractive index (of a water wrt glass)= speed of light in glass/speed of light in water=2*108/2.2*108​ =0.9090

Regards

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