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MCQMediumJEE Main 2025 · 22 January, Shift 1Refraction & Lenses

Physics Question from JEE Main 2025 · 22 January, Shift 1

In the diagram given below, there are three lenses formed. Considering negligible thickness of each of them as compared to R1R_1 and R2R_2, i.e., the radii of curvature for upper and lower surfaces of the glass lens, the power of the combination is:

A container with water above and below a central glass region, forming three lenses. The upper and lower media are water with refractive index 4/3, and the middle glass has refractive index 3/2.
  • A

    −16(1∣R1∣+1∣R2∣)-\frac{1}{6} \left( \frac{1}{|R_1|} + \frac{1}{|R_2|} \right)

  • B

    −16(1∣R1∣−1∣R2∣)-\frac{1}{6} \left( \frac{1}{|R_1|} - \frac{1}{|R_2|} \right)

  • C

    16(1∣R1∣+1∣R2∣)\frac{1}{6} \left( \frac{1}{|R_1|} + \frac{1}{|R_2|} \right)

  • D

    16(1∣R1∣−1∣R2∣)\frac{1}{6} \left( \frac{1}{|R_1|} - \frac{1}{|R_2|} \right)

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