Question

find the power of a concave lens of focal length 2 metre




plz answer only relevant answers​

Answer 1

Power is the reciprocal of focal length in metres

Your answer:-

P = 1/-2

= -0.5 D

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Answer 2

Answer:

-0.5 dioptre

Explanation:

In concave lens, f = -2 meter (According to sign convention)

P = 1/f

P= 1/(-2)

P = -0.5 dioptre