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CBSE Class 10 Answered

power of lenses
Asked by chipree | 18 Jun, 2008, 11:05: PM
answered-by-expert Expert Answer

It is the reciprocal of the focal length of the lens. P =1/f.

If lens is convex then f is positive and power is also positive.

If lens is concave the f is negative and power is also negative.

Answered by | 21 Jun, 2008, 04:35: PM

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