Question

the power of lens is -4 find its focal length​

Answer 1

Explanation:

Power is 1/f

F=-1/4

F=-0.25 m

F=-25cm

Answer 2

Answer:

Heya mate✌✌✌

As we know that power of a lens is inversely proportional to its focal length.

A/q, it is given that

P = -4 D

So, P = 1/f

-4 = 1/f

f = 1/-4

f = -1/4

f = -1/4 × 100

f = -25 cm

Hope it helps✌✌✌