A convex lens is put 10 cm from a light source and it makes a sharp image on a screen, kept 10 cm
Channel: Doubtnut
Date: 2020-01-03

A convex lens is put 10 cm from a light source and it makes a sharp image on a screen, kept 10 cm from the lens. Now a glass block (refractive index 1.5) of 1.5 cm thickness id placed in contact with the light source. To get the sharp image again, the screen is shifted by a distance d. Then d is :