A vessel of depth '$d$' is half filled with oil of refractive index $n_{1}$ and the other half is filled with water of refractive index $n_{2}$. The apparent depth of this vessel when viewed from above will be-

Question

$\frac{2 d\left(n_{1}+n_{2}\right)}{n_{1} n_{2}}$

$\frac{d\left(n_{1}+n_{2}\right)}{2 n_{1} n_{2}}$

$\frac{d n_{1} n_{2}}{2\left(n_{1}+n_{2}\right)}$

$\frac{d n_{1} n_{2}}{\left(n_{1}+n_{2}\right)}$

Solution

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