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In a certain camera, a combination of four similar thin convex lenses are arranged axially in contact. Then the power of the combination and the total magnification in comparison to the power (p) and magnification (m) for each lens will be, respectively

Asked in NEET 2025 · Combinations and silvered lenses

Answer: (3) 4p and m⁴

Step-by-step solution

Powers of thin lenses in contact add: P=p+p+p+p=4p.

Each lens forms an image that the next lens uses as its object, so the magnifications multiply: M=m× m× m× m=m⁴.

So 4p and m⁴, as the paper keys it.

Why the other options are wrong

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