Concave mirror of radius 30 cm is placed in water.Its focal length in air and water will be?
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डरबथढतढतவைநூழைவைஐழைழவைவைழைழ
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To Find: Focal length "f" = ? As we know that the focal length is half of the radius of curvature. Thus, the focal length in air and water differ by 15 cm
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