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Given is a thin convex lens of glass (refractive index μ ) and each side having radius of curvature R. One side is polished for complete reflection.…

JEE Main 2025 — Physics Optics

2025mcqeasy

Given is a thin convex lens of glass (refractive index μ\muμ ) and each side having radius of curvature RRR. One side is polished for complete reflection. At what distance from the lens, an object be placed on the optic axis so that the image gets formed on the object itself ?

Official previous-year question

Held on 22 Jan 2025 · Verified 6 Jul 2026.

Options

  1. A

    R/μ\mathrm{R} / \muR/μ

  2. B

    R/(2μ−3)R /(2 \mu-3)R/(2μ−3)

  3. C

    μR\mu RμR

  4. D

    R/(2μ−1)\mathrm{R} /(2 \mu-1)R/(2μ−1)

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