Question

power of lens is minus 40, its focal length is?​

Answer 1

Answer:

Explanation:

Here, P is the power of the lens and f is the focal length of the lens in meter (m). Given, P = - 40 D. f = -0.025 m. Thus, the focal length of the lens is -0.025 m.

Answer 2

Answes

Hi Here Is Ur Answer

-40 only when the power of the lens is more the focallenght also be more

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Explanation: