The power of a convex lens of focal length $2$ metre will be:

+ 0.5 D

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+ 5 D

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+ 50 D

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- 5 D

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Solution

The correct option is A $+ 0.5 D$
The power of convex lens is,
$P = \frac{1}{f}$
Putting the value of focal length we get,
$P = \frac{1}{2} = 0.5 D$

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The power of a convex lens of focal length 2 metre will be:

The correct option is A +0.5DThe power of convex lens is,P=1fPutting the value of focal length we get,P=12=0.5 D

The power of a convex lens of focal length $2$ metre will be:

The correct option is A $+ 0.5 D$
The power of convex lens is,
$P = \frac{1}{f}$
Putting the value of focal length we get,
$P = \frac{1}{2} = 0.5 D$