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Q.

An equiconvex lens has power P. It is cut into two symmetrical halves by a plane containing the principal axis. The power of one part will be,

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a

P

b

0

c

P2

d

P4

answer is A.

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Detailed Solution

Question Image

If lens is cut in two half as shown in the figure, then power of one part will be same. i.e. P, as focal length remains same.

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