Time taken by sunlight to penetrate 2 mm in a glass slab is of the order of (n=1.5)A. ` 10^(-16)` secB. `10^(-19) ` secC. `10^(-11)` secD. `10^(-7)` sec

Time taken by sunlight to penetrate 2 mm in a glass slab is of the ord

1.	Time taken by sunlight to penetrate 2 mm in a glass slab is of the order of (n=1.5)A. ` 10^(-16)` secB. `10^(-19) ` secC. `10^(-11)` secD. `10^(-7)` sec
Answer» Correct Answer - C `V_(g)=( 3 xx 10^(8))/(1.5) = 2xx 10^(8) m//s ` `:. t=("Distance ")/("Velocity")=(2 xx 10^(-3))/(2 xx 10^(8))=10^(-11)` sec

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Time taken by sunlight to penetrate 2 mm in a glass slab is of the order of (n=1.5)A. ` 10^(-16)` secB. `10^(-19) ` secC. `10^(-11)` secD. `10^(-7)` sec

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