Question

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

Answer 1

Focal length of concave mirror, f = -2m

Now,

Power, p =$\frac{1}{f(in\:m)}$

p = $\frac{1}{-2}$

$\longrightarrow$ p = 0.5 dioptres

Answer 2

Answer:

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