Question

The power of diverging lens having focal length as 25cm is

Answer 1

Answer:

The answer will be 4D

Explanation:

According to the problem  the focal length of the lens is given

Now the power can be calculated by  the formula given below

Power  = 1/focal length (in meter)

Therefore for this question

the focal length is given in cm , we have converted it into meter.

Let  the power of the lens will be P

Hence P  = 1/ - 0.25 = 4 D(negative)