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Physics - Ray Optics

Practise 92 COMEDK previous year questions on Ray Optics, compiled from papers spanning 2012 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty COMEDK tests.

Ray Optics has been asked in 15 of the 15 years of COMEDK papers analysed (2012–2026), with 92 questions in all. 33% of them were easy, 54% moderate and 13% tough. Most of its questions came from 2025, with 17 questions that year. In the last three years (2024–2026) it had 42 questions across 10 papers, about 4.2 per paper.

The chapter's 9 topics are not weighted equally: Lens Formula, Refraction of light from curved surface (21 questions, 23%), Refraction of light from plane surface (18 questions, 20%), and Prism and Dispersion of Light (14 questions, 15%) have been asked the most. Lens Formula, Refraction of light from curved surface has also led over the last five years, with 17 questions. Critical angle and total internal reflection has produced the most tough questions (3).

  1. 1A glass slab of 16 cm thickness has its bottom surface silvered. An air bubble is located inside the glass slab at a distance of 8 cm from t09 May, 2026 (S1)Refraction of light from plane surface
  2. 2If a clear liquid has a refractive index of 1.45 and a transparent solid has a refractive index of 2.9, then for total internal reflection t09 May, 2026 (S1)Critical angle and total internal reflection
  3. 3An object is placed at an unknown distance from a convex objective lens of focal length 8 cm. The objective lens forms a real image which ac09 May, 2026 (S1)Optical Instruments
  4. 4An object is placed 25 cm in front of a fully silvered concave mirror of focal length 15 cm. A plane mirror is placed 35 cm behind the conca09 May, 2026 (S1)Mirror Formula, Reflection in Spherical Mirror
  5. 5The critical angle for a typical glass air interface is . If a ray of light falls normally on one of the faces of the prism of angle . The e09 May, 2026 (S2)Critical angle and total internal reflection
  6. 6The distance between the objective and eye piece of astronomical telescope in normal adjustment is 27 cm and its magnifying power is 8. What09 May, 2026 (S2)Optical Instruments
  7. 7The ratio of the angle of deviation produced by a thin prism, when it is placed in air to the angle of deviation produced when it is immerse09 May, 2026 (S2)Prism and Dispersion of Light
  8. 8An object placed 40 cm in front of a thin convex lens is moved to 60 cm from the lens. If the focal length of the lens is 30 cm the ratio of09 May, 2026 (S2)Lens Formula, Refraction of light from curved surface
  9. 9A plano-convex lens made of refractive index 1.5 and having radius of curvature fits exactly into a plano-concave lens made of refractive in25 May, 2025 (Shift)Lens Formula, Refraction of light from curved surface
  10. 10What is the refractive index of a material of prism if the frequency of light wave in it is . The wavelength of light in the material of pri25 May, 2025 (Shift)Refraction of light from plane surface
  11. 11An incident ray is incident at an angle on one face of a prism. It emerges at an angle of . The ray suffers a deviation of . The refractive 25 May, 2025 (Shift)Prism and Dispersion of Light
  12. 12A biconvex lens has two different refractive indices in different regions. The upper half has a refractive index 1.7 and the lower half has 25 May, 2025 (Shift)Lens Formula, Refraction of light from curved surface
  13. 13Two light rays A and B travel from a medium into air at angles of incidence 15 degrees and 42 degrees respectively. In the medium, light tra10 May, 2025 (S1)Critical angle and total internal reflection
  14. 14A convex lens forms a real image of an object with magnification . The lens is moved towards the object to obtain another real image of magn10 May, 2025 (S1)Lens Formula, Refraction of light from curved surface
  15. 15A symmetric double convex lens is cut into two equal parts by a plane perpendicular to the principal axis. If the power of the original lens10 May, 2025 (S1)Lens Formula, Refraction of light from curved surface
  16. 16One surface of a lens is convex and the other is concave. If the radii of curvatures are and respectively, the lens will be convex if10 May, 2025 (S1)Lens Formula, Refraction of light from curved surface
  17. 17A beam of light parallel to the principal axis of a concave and convex lens, first passes through the concave lens of focal length 0.5 m and10 May, 2025 (S2)Lens Formula, Refraction of light from curved surface
  18. 18The focal lengths of the objective and eyepiece of a compound microscope are 1 cm and 10 cm respectively. Length of the tube is 25 cm . If t10 May, 2025 (S2)Optical Instruments
  19. 19A ray of light is travelling from glass of refractive index to water of refractive index . What is the minimum angle of incidence for which 10 May, 2025 (S2)Critical angle and total internal reflection
  20. 20When a body of refractive index is put into a liquid, the body becomes invisible. What would be the refractive index of the medium?10 May, 2025 (S2)Refraction of light from plane surface
  21. 21What is the velocity of light in vacuum if the velocity of light in a medium of refractive index 1.2 is ' v ' ?10 May, 2025 (S2)Refraction of light from plane surface
  22. 22A plano-convex lens made of refractive index 1.5 and having radius of curvature fits exactly into a planoconcave lens made of refractive ind10 May, 2025 (S3)Lens Formula, Refraction of light from curved surface
  23. 23An object of height is placed midway between and in front of a biconvex lens. A real inverted image is captured on a screen placed a little 10 May, 2025 (S3)Lens Formula, Refraction of light from curved surface
  24. 24A beam of incident parallel light falls on a diverging lens of focal length 20 cm in magnitude. If a converging lens of focal length 15 cm i10 May, 2025 (S3)Lens Formula, Refraction of light from curved surface
  25. 25In the normal adjustment of an astronomical telescope, the objective and eyepiece are 36 cm apart. If the magnifying power of the telescope 10 May, 2025 (S3)Optical Instruments
  26. 26In a container of height , certain transparent liquid is taken to a height of . When seen from above, it appears half filled. The refractive2024 (Afternoon Shift)Refraction of light from plane surface
  27. 27Light enters at an angle of incidence in a transparent rod of refractive index ' '. The least value of ' ' for which the light once entered 2024 (Afternoon Shift)Critical angle and total internal reflection
  28. 28To a fish under water, viewing obliquely, a fisherman standing on the bank of a lake looks2024 (Afternoon Shift)Refraction of light from plane surface
  29. 29An object is placed at a distance of from a convex lens on its principal axis and a virtual image of certain size is formed. If the object i2024 (Afternoon Shift)Lens Formula, Refraction of light from curved surface
  30. 30Figure below shows a lens of refractive index, . and are the centres of curvature of the two faces of the lens of radii of curvature and res2024 (Evening Shift)Lens Formula, Refraction of light from curved surface
  31. 31When a biconvex lens of glass of refractive index 1.5 is dipped in a liquid, it acts like a plane sheet of paper. This means the refractive 2024 (Evening Shift)Lens Formula, Refraction of light from curved surface
  32. 32A hollow prism is filled with water and placed in air. It will deviate the incident rays2024 (Evening Shift)Prism and Dispersion of Light
  33. 33A telescope has an objective of focal length 60 cm and eyepiece of focal length 5 cm. The telescope is focussed for least distance of distin2024 (Evening Shift)Optical Instruments
  34. 34The radius of curvature of the curved surface of a plano-convex lens is 60 cm . If refractive index of the material of prism is 1.6 , then f2024 (Memory Based)Lens Formula, Refraction of light from curved surface
  35. 35Which of the following does not change during refraction of light?2024 (Memory Based)Refraction of light from plane surface
  36. 36For large angular magnification of refracting telescope, it has an objective lens of2024 (Memory Based)Optical Instruments
  37. 37A light of wavelength and frequency is travelling in a medium. The refractive index of the medium is2024 (Memory Based)Refraction of light from plane surface
  38. 38If an equiconvex lens is made of number of layers of different refractive index for a given wavelength as shown in the figure, then number o2024 (Memory Based)Lens Formula, Refraction of light from curved surface
  39. 39For a prism when a ray of light is incident at an angle on one of its faces, the emergent ray passes normal to the other surface. Then the r2024 (Morning Shift)Refraction of light from plane surface
  40. 40A ray of light travelling through a medium of refractive index is incident on a glass of refractive index . Find the angle of refraction in 2024 (Morning Shift)Refraction of light from plane surface
  41. 41In the normal adjustment of an astronomical telescope, the objective and eyepiece are apart. If the magnifying power of the telescope is 7, 2024 (Morning Shift)Optical Instruments
  42. 42When a particular wave length of light is used the focal length of a convex mirror is found to be . If the wave length of the incident light2024 (Morning Shift)Mirror Formula, Reflection in Spherical Mirror
  43. 43What will be the wave length, if a light of wave length 600 nm travels from air enters a medium of refractive index 1.5 and continues its jo2023 (Evening Shift)Refraction of light from plane surface
  44. 44A person has a normal near point . What is the magnifying power of the simple microscope he used, if the focal length of the convex lens use2023 (Evening Shift)Optical Instruments
  45. 45When angle of incidence on one face of the equilateral glass prism is of the angle of prism, the ray of light undergoes minimum deviation. I2023 (Evening Shift)Prism and Dispersion of Light
  46. 46A lens of power is made in contact with another lens of power the combination will then act as a:2023 (Evening Shift)Lens Formula, Refraction of light from curved surface
  47. 47The critical angle of a medium having the refractive index is :2023 (Evening Shift)Critical angle and total internal reflection
  48. 48An air bubble in water is shown in figure. The apparent depth of the image of the bubble in plane mirror viewed by observer is.2023 (Memory Based)Refraction of light from plane surface
  49. 49A fish in water (refractive index ) looks at a bird vertically above in the air. If is the height of the bird and is the depth of the fish f2023 (Memory Based)Refraction of light from plane surface
  50. 50A fish in water (refractive index ) looks at a bird vertically above in the air. If is the height of the bird and is the depth of the fish f2023 (Morning Shift)Refraction of light from plane surface

Frequently Asked Questions

1.How many questions are available for Ray Optics?

This chapter includes 92 questions compiled from COMEDK papers spanning 2012 to 2026.

2.Are these questions only from COMEDK, or from other exams too?

These are COMEDK questions specifically for the Ray Optics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Ray Optics an important chapter for COMEDK Physics?

Ray Optics has appeared in 15 of the 15 years of COMEDK papers covered here, with 92 questions across 24 papers - about 4 per paper it appears in.

4.What is the difficulty level of Ray Optics questions in COMEDK?

Of the 92 questions analysed for this chapter, 33% are easy, 54% moderate and 13% tough. 2025 had the most, with 17 questions.

5.Which topics in Ray Optics should I focus on?

These topics have carried the most weightage in Ray Optics:

  • Lens Formula, Refraction of light from curved surface - 21 questions (23%)
  • Refraction of light from plane surface - 18 questions (20%)
  • Prism and Dispersion of Light - 14 questions (15%)
  • Critical angle and total internal reflection has produced the most tough questions (3).
6.Is Ray Optics's weightage in COMEDK going up or down?

Across all 24 papers analysed, Ray Optics has averaged about 3.8 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 4.2 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.