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A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after refraction its velocity is reduced by 20%. The angle of deviationA. `i/8`B. `i/5`C. `i/2`D. `(4i)/5` |
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Answer» Correct Answer - B According to question, at glass-air interface velocity is reduced by 20% of the velocity of light. So, deviation =20% of I = `(20xx i)/(100)=(i)/(5)` |
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