Question

Find the power of concave lens of focal length 3 metre

Answer 1

Answer.....

Given

• f= -3 (sign conventions)

We know

P = 1/ f

P = 1/(-3)

P = -0.3333...D

Therefore, the power of concave lens of focal length 3m is -0.333... D( dioptre)

Hope it helps u...

Answer 2

Answer.....

Given

f= -3 (sign conventions)

We know

P = 1/ f

P = 1/(-3)

P = -0.3333...D

Therefore, the power of concave lens of focal length 3m is -0.333... D( dioptre)