Large number of thin strips of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be : ## Page 5 CLICK HERE - JOIN @APNAPDFS

Explanation

A large number of thin black strips are drawn on the surface of a convex lens of focal length 20 cm. to farm the image of a white horse. This blocks a large partion of the lens and allows light rays to pass through Only a Small partion. This reduces the effective aperture of the lens and makes the im- age of the horse less bright.