Question

a convergent lens of power 8 D is combined with the divergent lens of power -10 D calculate the power of combination
Explain with solution​

Answer 1

Answer:

Convex lens is converging lens while concave lens is diverging lens. If these two types of lens of same power are combined together, the diverging power of one will be cancelled out by the converging power of the other. So the combination will act like a glass block.

Answer 2

Answer:

A convergent lens of power 16 D is used as a simple microscope. The magnification produced by the lens, when the final image is formed at least distance of distinct vision