Consider the lens involved to be plano-convex lens (instead of equiconvex lens) of…
Physics · JEE Advanced · NTA Exams — Optics
Consider the lens involved to be plano-convex lens (instead of equiconvex lens) of refractive index n and radius R in the given arrangement and then find its focal length.
- \(\frac{\mathrm{R}}{(2 \mathrm{n}-1)}\)
- \(\frac{2 R}{(2 n-1)}\)
- \(\frac{\mathrm{R}}{(\mathrm{n}-1)}\)
- \(\frac{2 R}{2(2 n+1)}\)
Answer
(C) R ( n -1)
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