Question

A thin symmetrical double convex lens of power P is cut into three parts, as shown in the figure, the power of the part 'A' is?

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

Answer 1

The correct option is D $P$

If we cut lens along principal axis, power of lens remains unchanged.

The power of the part 'A' is $P$.

The correct option is D.