Physics · 2025
JEE Main · 22 January 2025, Shift 1 · Q41
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.…
Given is a thin convex lens of glass (refractive index $\displaystyle \mu$ ) and each side having radius of curvature R. 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 answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle \mathrm{R} /(2 \mu-1)$
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.