Q.

A vessel of depth t is half filled with oil of refractive index μ1 and the other half is filled with water of refractive index  μ2. The apparent depth of the vessel when viewed from above is

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a

tμ1+μ22μ1μ2

b

2tμ1+μ2μ1μ2

c

2t μ1μ2μ1+μ2

d

t μ1μ22μ1+μ2

answer is D.

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Detailed Solution

The apparent depth is given by

   A I=t1μ1+t2μ2=t21μ1+1μ2      =tμ1+μ22μ1μ2

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