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Magnification by Thin Lenses

A convex lens...

Question

A convex lens of focal lengths 25 cm and a concave length of focal length 20 cm are mounted coaxially separated by a distance d cm. If the power of combination is zero, d is equal to

A

45

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B

30

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C

15

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D

5

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Solution

The correct option is D $5$
option D is correct

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