JEE Mains · Physics · STD 12 - 9. Ray optics and optical instruments
move in opposite direction with speed ratio \(1: 2\). The following figure represents two biconvex lenses \(L_1\) and \(L_2\) having focal length \(10 \mathrm{~cm}\) and \(15 \mathrm{~cm}\) respectively. The distance between \(\mathrm{L}_1 \& \mathrm{~L}_2\) is _______.
- A \(10 \mathrm{~cm}\)
- B \(15 \mathrm{~cm}\)
- C \(25 \mathrm{~cm}\)
- D \(35 \mathrm{~cm}\)
Answer & Solution
Correct Answer
(C) \(25 \mathrm{~cm}\)
Step-by-step Solution
Detailed explanation
\(D=f_1+f_2=25 \mathrm{~cm}\) Paraxial parallel rays pass through focus and ray from focus of convex lens will become parallel
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