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Q.

Power of a concave lens of focal length $2 m$ is [[1]] $D$

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Detailed Solution

Power of a concave lens of focal length

2 m

is

- 0.5 D

Focal length of concave lens

(f) = - 2 m

Power of lens (P) = \frac{1}{f}

=>

P = \frac{1}{- 2}

∴ P = - 0.5 D

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Power of a concave lens of focal length 2 m is [[1]]D