Physics · 2025
JEE Main · 22 January 2025, Shift 1 · Q42
In the diagram given below, there are three lenses formed. Considering negligible thickness of each of them as compared to | R_1| and | R_2|, i.e.,…
In the diagram given below, there are three lenses formed. Considering negligible thickness of each of them as compared to $\displaystyle \left|\mathrm{R}_1\right|$ and $\displaystyle \left|\mathrm{R}_2\right|$, i.e., the radii of curvature for upper and lower surfaces of the glass lens, the power of the combination is
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle -\frac{1}{6}\left(\frac{1}{\left|\mathrm{R}_1\right|}-\frac{1}{\left|\mathrm{R}_2\right|}\right)$
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.