Question

11.Power of lens is - 40 D , its focal length is

Answer 1

Answer:

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Explanation:

The focal length of the lens is -0.025 m.

Explanation:

The relation between power and focal length of the lens is given by

Here, P is the power of the lens and f is the focal length of the lens in meter (m).

Given, P = - 40 D.

Substitute the value of the power in above formula, we get

f = -0.025 m.

Thus, the focal length of the lens is -0.025 m.