Question

A thin symmetrical double convex lens of power $P$ is cut into three parts, as shown in the figure. Power of $A$ is:

• A. $2P$
• B. $\frac{P}{2}$
• C. $\frac{P}{3}$
• D. $P$

Answer 1

The correct option is D $P$

On cutting the lens parallel to its principal axis, focal length does not change. So, power $P$ will not change.