Question

what is the power of concave lens focal length 50cm​

Answer 1

A concave lens has a focal length of 50 cm. Calculate its power. Power of lens = -2 Dioptres. Since the focal length of a concave lens is always negative so power of the concave lens is -2 diopters.

Explanation:

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Answer 2

p = 1

___

f

p = 1

_____

50cn