Q 12-09-006NEETNEET 2025Top questionEasy
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 –
Answer: (C) $4p$ and $m^4$
For thin lenses in contact, the powers add:
$$P = p + p + p + p = 4p$$
For lenses used in succession, each forms an image that is the object for the next, so the magnifications multiply:
$$M = m \times m \times m \times m = m^4$$
Solution by Sreeraj P, M.Sc Physics