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Question

# Consider the situation shown in the figure below. Water (μw=43) is filled in a beaker up to a height of 10 cm. A plane mirror is fixed at a height of 5 cm from the surface of the water. The distance of the image of an object O kept at the bottom of the beaker, from the mirror will be:

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 cm From the figure, it is clear that object appears to be raised by 104cm (2.5 cm). Hence, the distance between mirror and O′ = 5+7.5 = 12.5 cm. So, the final image will be formed 12.5 cm behind the plane mirror.

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