In a certain camera, a combination of four similar thin convex lenses is arranged axially in contact. Then the power of the combi…

Question

In a certain camera, a combination of four similar thin convex lenses is 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:

1. A. 4p and 4m
2. B. p^4 and 4m
3. C. 4p and m^4 (Correct answer)
4. D. p^4 and m^4

Correct Answer

Option C — 4p and m^4

Detailed Solution & Explanation

The correct answer is $4p$ and $m^4$.

Key Points

• For thin lenses in contact, powers add: $p_{eff}=p_1+p_2+p_3+p_4=4p$.
• Magnifications multiply: $m_{eff}=m_1\times m_2\times m_3\times m_4=m^4$.