Question

power of a lens is -5D then its focal length is​

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.

Answer 2

Answer:

f = 1/-5

Explanation:

P= 1/f

so, -5 =1/f

or, f=1/ -5