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Question

# Consider the situation shown in Fig. Water (μ=4/3) is filled in a beaker upto a height of 10 cm.A plane mirror is 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
15cm
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B
12.5cm
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C
7.5cm
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D
10cm
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Solution

## The correct option is B 12.5cmAs seen from out side shift observed due to water is t×(1−1μ)=10×(1−34)=2.5and for the mirror object distance is 5+10−2.5=12.5Hence the image distance from mirror is 12.5, Hence option B is correct .

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