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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 focused at the distance of 32cm from the mirror If the tank filled with water upto a height of 20cm then the sunlight will now focussed at

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 focused at the distance of 32cm from the mirror If the tank filled with water upto a height of 20cm then the sunlight will now focussed at

Grade:12

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