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Question: The ratio of thickness of plates of two transparent mediums A and B is 6 : 4. If light takes equal t...

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

A

1.4

B

1.5

C

1.75

D

1.33

Answer

1.5

Explanation

Solution

By using t=μxct = \frac { \mu x } { c }

μBμA=xAxB=64\frac { \mu _ { B } } { \mu _ { A } } = \frac { x _ { A } } { x _ { B } } = \frac { 6 } { 4 }