Ray Optics and Optical Instruments

CBSE Class 12 · Physics · 23 past questions

4 of 23 · show all

1. Q1 2026

   A thin plano-convex lens and a thin equi-concave lens are kept coaxially in contact as shown in the figure.… (with a figure)

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2. Q5 2026

   A concave lens of focal length 10 cm is cut into two identical plano-concave lenses. The focal length of each…

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3. Q18 2024

   A convex lens (n = 1·52) has a focal length of 15·0 cm in air. Find its focal length when it is immersed in…

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4. Q23 2022

   Two transparent media of refractive indices $n_1$ and $n_2$ are separated by a spherical transparent surface.…

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