Question

if focus is 2cm of concave lens, then find the power?



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Answer 1

Given, Focus, f = 2 cm = 0.02 m

Hence , Power of lens = 1/0.02 = 50 Dioptre

Answer 2

Hloo dear.....

focal length is given tga 2 m

power of lens p = 1/f

P = 1 / -2 ( v shd always take it negative)

P = -0.5 D

hope it helps