Question

i will follow u and give u brainliest if u anser 1 ques pls. A lens has focal length -50 cm. Find its power .A converging lens has focal length 12 cm, forms a real image at 48cm. Find the distance of the object.

Answer 1

Explanation:

For lens with f = -50cm

P=1/f ( f in metres)

P=1/-0.5

P= -2 D

CASE II

F= 12cm, v=48cm

Using lens formula

1/f=1/v-1/u

1/12= 1/48 - 1/u

1/12 - 1/48 =1/u

3/48 = 1/u

u= 16cm