a container is filled with water (refractive indez=1.33)upto a height of 33.25 . aconcave mirror is placed 15 cm above the water level and the image of an objplaced at the bottom is formed 25 cm below the water level .the focal length of mirror is?
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A container is filled with water up to a height of 33.25. It is given that the refractive index μ =1.33. A concave mirror can be placed 15 cm above water level and the image of the object placed at the bottom is formed 25 cm below the level of water. The focal length of the mirror must be 20 cm. Hence the correct answer is C.
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