A vessel of depth d is half filled with a liquid of refractive index `mu_1` and the other half is filled with a liquid of refractive index `mu_2`. The apparent depth of the vessel, when looked at normally, is

Options

A. `d(1/mu_(1) + 1/mu_(2))`
B. `d(mu_(1) + mu_(2))`
C. `d/2(1/mu_(1) + 1/mu_(2))`
D. `d/2(mu_(1) + mu_(2))`

Answer

C

Explanation

`d_(a)=d_()/mu_(1) + d-(2)/mu_(2)`, `d_(1)=d_(2)=d/2`