Question

il The power of a conver lens of focal length
25cmis​

Answer 1

p= 1÷f(m)

with this formula you can solve the sum

Answer 2

Answer:

+4 D

The power of the convex lens is +4 D.

We need to find the power of convex lens of focal length 25 cm. The inverse of focal length equals power of a lens. So, So, the power of the convex lens is +4 D.

OR

P = + 4 D. Since it is a positive focal length, the lens will be a convex lens or a converging lens and the power is written as '+'.

Explanation:

I hope it will be helpful for you..