What is the power of a convex lens of focal length 10 cm -A- 0-1 DB- -0-1 DC- 10 DD- -10 D

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What is the power of a convex lens of focal length 10 cm?

0.1 D

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-0.1 D

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10 D

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-10 D

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Solution

The correct option is C 10 D
For a convex lens, the focal length is positive i.e. f = +10 cm
$P = \frac{1}{f} = \frac{1}{0.10 m} = 10 D$

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What is the power of a convex lens of focal length 10 cm?

The correct option is C 10 DFor a convex lens, the focal length is positive i.e. f = +10 cm P=1f=10.10 m=10 D

The correct option is C 10 D
For a convex lens, the focal length is positive i.e. f = +10 cm
$P = \frac{1}{f} = \frac{1}{0.10 m} = 10 D$