Time taken by sunlight to pass through a window of thickness `4 mm` whose refraactive index is `(3)/(2),` isA. `2 xx 10^(-1) sec`B. `2 xx 10^(8) sec`C. `2 xx 10^(-11) sec`D. `2 xx 10^(11) sec`

Time taken by sunlight to pass through a window of thickness `4 mm` wh

1.	Time taken by sunlight to pass through a window of thickness `4 mm` whose refraactive index is `(3)/(2),` isA. `2 xx 10^(-1) sec`B. `2 xx 10^(8) sec`C. `2 xx 10^(-11) sec`D. `2 xx 10^(11) sec`
Answer» Correct Answer - C `v_(m) = (v_(a))/(mu_(m)) = (3 xx 10^(8))/(1.5) = 2 xx 10^(8)m//s` Thus, time `= ("distance")/("velocity") = (4 xx 10^(-3))/(2 xx 10^(8))` `= 2 xx 10^(-11) sec`

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Time taken by sunlight to pass through a window of thickness `4 mm` whose refraactive index is `(3)/(2),` isA. `2 xx 10^(-1) sec`B. `2 xx 10^(8) sec`C. `2 xx 10^(-11) sec`D. `2 xx 10^(11) sec`

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