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A microscope is focussed on a coin lying...

A microscope is focussed on a coin lying at the bottom of a beaker. The microscope is now raised up by `1 cm`. To what depth should the water be poured into the beaker so that coin is again in focus ? (Refration index of water is `4//3`)

A

1 cm

B

`4/3` cm

C

3 cm

D

4 cm

Text Solution

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The correct Answer is:
d
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