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Question: Answered & Verified by Expert
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 $L_1 \& L_2$ is :

PhysicsRay OpticsJEE MainJEE Main 2024 (09 Apr Shift 2)
Options:
  • A $10 \mathrm{~cm}$
  • B $35 \mathrm{~cm}$
  • C $25 \mathrm{~cm}$
  • D $15 \mathrm{~cm}$
Solution:
1104 Upvotes Verified Answer
The correct answer is: $25 \mathrm{~cm}$

$D=f_1+f_2=25 \mathrm{~cm}$
Paraxial parallel rays pass through focus and ray from focus of convex lens will become parallel

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