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A light is travelling from air a medium the velocity of light in a medium is reduced to to 0.75 times the velocity n air assume that angle of incidence I is very small the deviation of the ray isA. iB. `(i)/(3)`C. `(i)/(4)`D. `(3i)/(4)` |
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Answer» Correct Answer - b When a light travels from air into a medium then velocity of light in a medium is `V_(m)=V-0.75 V= 0.25 V` where v is velocity of light in air using snell law we have `(sini)/(sin r)= mu =(v)/(v_(m))` or `(i)/(r )=(v)/(v_(m))` or `(i)/(r )=(v)/(0.25 V)=4 rarr r=(i)/(4)` |
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