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A convex lens has power P. It is cut into two halves along its principal axis. Further one piece (out of the two halves) is cut into two halves perpendicular to the principal axis (as shown in figure). Choose the incorrect option for the reported pieces.

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Power of $L_{1} = \frac{P}{2}$

Power of $L_{2} = \frac{P}{2}$

Power of $L_{3} = \frac{P}{2}$

Power of $L_{1} = P$

answer is A.

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Detailed Solution

Left shape: elongated lens with a dashed vertical axis, labeled P at the bottom.

Right side after splitting:

Top-left piece: P₂ = P/2
Top-right piece: P₃ = P/2
Bottom piece: P₁ = P

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