Q. 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–
A) $4p$ and $4m$
B) $p^4$ and $4m$
C) $4p$ and $m^4$
D) $p^4$ and $m^4$
Explanation
[Solution by Claude - not from source] Powers add for lenses in contact: $P=4p$. Each lens forms an image that is the object for the next, so magnifications multiply: $m^4$. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.