Two thin lenses of power +4 D and -2 D are in contact. What is

power 4dUp the stakes with 4D Jackpot, an extension of the orinal 4D game with a multi million ringgit prize! 1. Pick two 4-dit numbers from 0000 to 9999, e.g. (1188, 2288), (3388, 2233), or (1338,The focal length of a lens with a power of +4D is 25 cm. Show More | Share Save. Class 12 PHYSICS GEOMETRICAL OPTICS. Topper's Solved these Questions. OPTICS BOOK -