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Q.

A plane mirror in placed at bottom of a tank containing a liquid of refractive index μ. P is a small object at a height 'h' above the mirror. An observer "O" vertically above P outside the liquid observes P & its image in the mirror. The apparent distance between these two will be

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a

2hμ1

b

2μh

c

h(1+1μ)

d

2hμ

answer is B.

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Detailed Solution

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Let x be the depth of point P from surface

App. depth of point P from surface, x=xμ

App. depth of image of P from surface =x+2hμ

So, separation between two =x+2hμxμ2hμ

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