Question

6. How is the power of lens related to its focal length?
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Answer 1

Answer:

If a lens has a shorter focal length it is said to be more powerful. The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D).

Explanation:

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Answer 2

Answer:

Power = 1 / focal length

Explanation:

Power refers to the ability of the optical object to converge or diverge light.

Whereas focus is the point on the principle axis when the light Ray's after reflection or refraction passes.

Higher the power, more the light will be diverged and smaller will be the focal length and vice versa.

From this we can say, P=1/f