A thin biconvex lens of refractive index 3 2 is placed on a

Last updated: 6/7/2023

A thin biconvex lens of refractive index 3 2 is placed on a horizontal plane mirror as shown The space between the lens and the mirror is then filled with water of refractive index 4 3 It is found that when a point object is placed 15cm above the lens on its principal axis the object coincides with its own images On representing with another liquid the object and the image again coincide at a distance 25cm from the lens Calculate if the refractive index of the liquid is