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Power of the lens - class-XII
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Two thin lenses of focal length $f _1$ and $f _2$ are in contact and coaxial. The power of the combination is
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A
$\frac{f _1+f _2}{f _1f _2}$
💡 Explanation:
For the lenses placed coaxially,
We have the relationship $P=P _1+P _2+P _3+......$
So,for given case P=$P _1+P _2$ or $P $= $\dfrac{1} {f _1} $+ $\dfrac{1} {f _2} $
So,C is the correct answer.