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14/09/2021 7:35 pm
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Find the power of a concave lens of focal length 2 m.
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14/09/2021 7:36 pm
Given: Focal length, f = -2 m = -200 cm
∴ Power, P = \(\frac{100}{f}\) = \(\frac{100}{-200}\)
= -0.5 D