light falls 63 A parallel beam of monochromatic on a

Last updated: 5/29/2023

light falls 63 A parallel beam of monochromatic on a combination of a convex lens and a concave lens of focallengths 15 cm and 5 cm If the light emerges parallel from the concave lens the distance between the lenses is 1 20 cm 2 3 cm 3 10 cm 4 45 cm