Question
A biconvex lens with focal length f in air and refractive index of 1.5 is floating on the surface of a deep pond of water (refractive index 1.33). If an object is placed at a height of 2 f vertically above the lens, then the dis†an ce between the lens and the image is A. f B. 2 f C. less than 2 f D. greater than 2 f