A concave mirror is placed at the bottom of an empty tank with face upwards and axis vertical. When sunlight falls normally on the mirror, it is focussed at distance of `32cm` from the mirror. If the tank filled with water `(mu=4//3)` up to a height of `20cm`, then the sunlight will now get focussed atA. 16 cm above water levelB. 9 cm above water levelC. 24 cm below water levelD. 9 cm below water level

A concave mirror is placed at the bottom of an empty tank with face up

1.	A concave mirror is placed at the bottom of an empty tank with face upwards and axis vertical. When sunlight falls normally on the mirror, it is focussed at distance of `32cm` from the mirror. If the tank filled with water `(mu=4//3)` up to a height of `20cm`, then the sunlight will now get focussed atA. 16 cm above water levelB. 9 cm above water levelC. 24 cm below water levelD. 9 cm below water level
Answer» Correct Answer - B

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