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← CBSE Class 12 PYQ

Ray Optics and Optical Instruments

CBSE Class 12 · Physics · 23 past questions

  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)
  2. Q2 2026
    A telescope has an objective lens of focal length 144 cm and an eyepiece of focal length 6·0 cm. The…
  3. Q3 2026
    In which of the following, total internal reflection does *not* occur ?
  4. Q4 2026
    A ray of light is travelling through a rectangular glass slab (refractive index $\dfrac{3}{2}$) and is…
  5. Q5 2026
    A concave lens of focal length 10 cm is cut into two identical plano-concave lenses. The focal length of each…
  6. Q6 2026
    A ray of light in air is incident at angle $\angle i$ on a face of an equilateral glass prism and is…
  7. Q7 2026
    A 5 cm long pencil is placed along the principal axis of a concave mirror of focal length 20 cm such that its…
  8. Q8 2026
    In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A…
  9. Q9 2025
    The magnification produced by a spherical mirror is $-2.0$. The mirror used and the nature of the image…
  10. Q10 2025
    An equiconvex lens is made of glass of refractive index 1·55. If the focal length of the lens is 15·0 cm…
  11. Q11 2025
    A tub is filled with a transparent liquid to a height of 30.0 cm. The apparent depth of a coin lying at the…
  12. Q12 2025
    A transparent solid cylindrical rod (refractive index $\frac{2}{\sqrt{3}}$) is kept in air. A ray of light… (with a figure)
  13. Q13 2024
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  14. Q14 2024
    The magnifying power of an astronomical telescope is 24. In normal adjustment, distance between its two…
  15. Q15 2024
    Explain the following…
  16. Q16 2024
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  17. Q17 2024
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  18. 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…
  19. Q19 2023
    A ray of monochromatic light propagating in air, is incident on the surface of water. Which of the following…
  20. Q20 2023
    In the given figure the radius of curvature of curved face in the plano-convex and the plano-concave lens is… (with a figure)
  21. Q21 2023
    The refractive indices of two media A and B are 2 and $\sqrt{2}$ respectively. What is the critical angle for…
  22. Q22 2022
    A ray of light is incident on a prism at an angle of $45^\circ$ and passes symmetrically as shown in the… (with a figure)
  23. Q23 2022
    Two transparent media of refractive indices $n_1$ and $n_2$ are separated by a spherical transparent surface.…