A convex lens is of focal length 10 cm. What is its Power ? 1. + 0.1 D
2. - 1 D
3. - 10 D
4. + 10 D
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Explanation:
f=10cm
P=1/f
=1/10
=0.1D
It is convex lens so the power is+0.1D
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Explanation:
very easy
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