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The ratio of thickness of plates of two ...

The ratio of thickness of plates of two transparent medium A and B is 6 : 4. If light takes equal time in passing through them, then refractive index of A with respect to B will be

A

1.4

B

1.5

C

1.75

D

1.33

Text Solution

Verified by Experts

The correct Answer is:
B
Time = `("Distance")/("speed") = (nx)/(x ) " " ` [nx = constant ]
`therefore " " (n_(A))/(n_(B)) = (X_(B))/(X_(A))`
`rArr " " n_(BA) = (X_(A))/(X_(B)) = (6)/(4) = 1.5`.
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