Question

what is the power of the lens when its focal length is 100 cm​

Answer 1

see your answer in the attachment above

Answer 2

Answer:

1D

Explanation:

Given that,

Focal length f = 100 cm

We know that,

The power of the lens is the reciprocal of the focal length of the lens.

the power of the lens is 1/f

Here, P = power of the lens

f = focal length of the lens

P = 1m/100cm=1m/1m (since 1m=100 cm)

Hence, The power of the lens is 1 D.