JEE Main 2007 — Ray Optics Question with Solution
JEE Main 2007
Question
Two lenses of power and are in contact with each other. The focal length of the combination is
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
$\begin{aligned}
& P=P_1+P_2=-10 \\
& f=\frac{1}{P} \Rightarrow-0.1 \mathrm{~m} \Rightarrow-10 \mathrm{~cm}
\end{aligned}$
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This is a previous-year question from JEE Main 2007, covering the Ray Optics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.