Chapter 18.2, Problem 25SSC

To determine

The meaning of diverging and converging lens, and the type of lens that each of these terms refer to.

Answer to Problem 25SSC

Concave lens is termed as diverging lens while convex lens is termed as converging lens.

Explanation of Solution

Introduction:

As the name suggests, a diverging lens is the one which diverges all the rays falling on it after refraction, while a converging lens is the one which converges all the rays falling on it to a point after refraction.

It is known that a concave lens diverges all the parallel rays falling on it after refraction while the convex lens converges all the parallel rays falling on it from infinity to a point termed as focus, after refracting them.

Conclusion:

Hence, after comparing the above definitions, it can be seen that a converging lens term is referred for convex lens while a diverging lens term is referred for a concave lens.