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Time taken by the sunlight to pass throu...

Time taken by the sunlight to pass through a slab of 4 cm and refractive index 1.5 is _____ s.

A

`2 xx 10^(10)`

B

`2xx10^(-8)`

C

`2xx10^8`

D

`2xx10^(-10)`

Text Solution

Verified by Experts

The correct Answer is:
D
d = 4 cm
`mu=1.5`
`mu=c/vrArrv=c/mu=(3xx10^8)/(1.5)=2xx10^8m//s`
Time `t=d/v=(4xx10^(-2))/(2xx10^8)=2xx10^(-10)` second.
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