Question

the power of a lens is 4.0d.the focal length and the nature of lens will be​

Answer 1

Answer:

Power of the lens is -4 D. We know that the power of a lens is defined as the reciprocal of focal length. We know that the focal length of the concave lens is negative. So, the nature of this lens is concave.

Explanation:

Hope this may help you....

- Tanvi.

Follow me !!