A plano convex lens has a thickness of 4cm When placed on a

Last updated: 6/13/2023

A plano convex lens has a thickness of 4cm When placed on a horizontal table with the curved surface in contact with it the apparent depth of the bottom most point of the lens is found to be 3cm If the lens is inverted such that the plane face is in contact with the table the apparent depth 1984 of the centre of the plane face of the lens is found to be 25 8cm Find the focal length of the lens