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Question

# Consider the situation shown in figure. Water (μw=43) is filled in a breaker upto a height of 10 cm. A plane mirror fixed at a height of 5 cm from the surface of water. Distance of image from the mirror after reflection from it of an object O at the bottom of the beaker is

A
15 cm
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B
12.5 cm
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C
7.5 cm
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D
10 cm
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Solution

## The correct option is B 12.5 cmFrom figure it is clear that object appears to be raised by 104cm(2.5cm) Hence distance between mirror and O'=5+7.5 =12.5 cm So final image will be formed at 12.5 cm behind the plane mirror.

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