Question

(a) explain difference between converging and diverging lens with the help of diagram
(b) power of lens is -1.5D what is the nature of this lens?

Answer 1

Nature of lens would be real and inverted.
I hope it help you

Answer 2

(b) as we know ,

P = 1/f

When p = power

f = focal length

Hence ....

- 1.5 = 1/f

Hence , f = 1/-1.5 = - 0.66

As focal length is negative ,

The lens is convex i.e. diverging .

Hope it'll help u