The focal length of the lens in a photographic camera is 5 cm. What is the power of the lens? -Do You Know?

The focal length of the lens in a photographic camera is 5 cm. What is the power of the lens? -Do You Know?
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1 Answer

Answer :

P=100/f (in cms) =100/5 1m= 100cm 0.2m= 20cm Hence,the power is 0.2 D The lens is convex as it is positive
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