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What is the power of a concave lens of f...

What is the power of a concave lens of focal length `25 cm` ?

A

4 dioptre

B

3 dioptre

C

- 4 dioptre

D

None of these

Text Solution

Verified by Experts

Here, `P = ? f = -25 cm` As `P = 100/f, f = 100/(-25) = -4 dioptre`.
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