JEE Physics

Refraction & Lenses: JEE Questions & Solutions

53 previous-year JEE Physics questions on Refraction & Lenses, each with a worked step-by-step solution.

Intermediate

Previous-year questions

  1. 01A parallel beam of light travelling in air (refractive index 1.0) is incident on a convex spherical glass surface of radius of curvature 50…NVAMediumJEE 2026
  2. 02The wavelength of light while it is passing through water is 540 nm. The refractive index of water is 4/3. The wavelength of the same light…MCQEasyJEE 2026
  3. 03The size of the images of an object, formed by a thin lens are equal when the object is placed at two different positions 8 cm and 24 cm…NVAEasyJEE 2026
  4. 04Five persons P₁, P₂, P₃, P₄ and P₅ recorded object distance u and image distance v using same convex lens having power +5 D as (25,96),…MCQEasyJEE 2026
  5. 05The magnitudes of power of a biconvex lens (refractive index 1.5) and that of a plano-concave lens (refractive index 1.7) are same. If the…MCQMediumJEE 2026
  6. 06A convex lens of refractive index 1.5 and focal length f=18 cm is immersed in water. The difference in focal lengths of the given lens when…NVAMediumJEE 2026
  7. 07A biconvex lens is formed by using two plano-convex lenses as shown in the figure. The refractive index and radius of curvature of surfaces…MCQMediumJEE 2026
  8. 08In the diagram given below, there are three lenses formed. Considering negligible thickness of each of them as compared to R₁ and R₂, i.e.,…MCQMediumJEE 2025
  9. 09Given is a thin convex lens of glass (refractive index μ) and each side having radius of curvature R. One side is polished for complete…MCQMediumJEE 2025
  10. 10A symmetric thin biconvex lens is cut into four equal parts by two planes AB and CD as shown in the figure. If the power of the original…MCQEasyJEE 2025
  11. 11A spherical surface of radius of curvature R, separates air from glass (refractive index = 1.5). The center of curvature is in the glass…MCQMediumJEE 2025
  12. 12What is the lateral shift of a ray refracted through a parallel-sided glass slab of thickness h in terms of the angle of incidence i and…MCQEasyJEE 2025
  13. 13Given a thin convex lens (refractive index μ₂), kept in a liquid (refractive index μ₁, μ₁ < μ₂) having radii of curvature |R₁| and |R₂|.…MCQMediumJEE 2025
  14. 14What is the relative decrease in focal length of a lens for an increase in optical power by 0.1 D from 2.5 D? ('D' stands for dioptre).MCQEasyJEE 2025
  15. 15A thin plano-convex lens made of glass of refractive index 1.5 is immersed in a liquid of refractive index 1.2. When the plane side of the…MCQMediumJEE 2025
  16. 16A plano-convex lens having radius of curvature of first surface 2 cm exhibits focal length of f₁ in air. Another plano-convex lens with…MCQEasyJEE 2025
  17. 17A photograph of a landscape is captured by a drone camera at a height of 18 km. The size of the camera film is 2 cm × 2 cm and the area of…MCQMediumJEE 2025
  18. 18In a long glass tube, a mixture of two liquids A and B with refractive indices 1.3 and 1.4 respectively, forms a convex refractive meniscus…MCQMediumJEE 2025
  19. 19Let u and v be the distances of the object and the image from a lens of focal length f. The correct graphical representation of u and v for…MCQEasyJEE 2025
  20. 20Two light beams fall on a transparent material block at point 1 and 2 with angle θ₁ and θ₂, respectively, as shown in the figure. After…NVAMediumJEE 2025
  21. 21Two identical symmetric double convex lenses of focal length f are cut into two equal parts L₁, L₂ by the AB plane and L₃, L₄ by the XY…MCQMediumJEE 2025
  22. 22Two concave refracting surfaces of equal radii of curvature and refractive index 1.5 face each other in air as shown in figure. A point…MCQMediumJEE 2025
  23. 23A convex lens made of glass (refractive index = 1.5) has a focal length of 24 cm in air. When it is totally immersed in water (refractive…MCQEasyJEE 2025
  24. 24A slanted object AB is placed on one side of convex lens as shown in the diagram. The image is formed on the opposite side. Angle made by…MCQMediumJEE 2025
  25. 25A spherical surface separates two media of refractive indices n₁ = 1 and n₂ = 1.5. The object O is placed 0.2 m to the left of the…MCQMediumJEE 2025
  26. 26A bi-convex lens has radius of curvature of both the surfaces same as 1/6 cm. If this lens is required to be replaced by another convex…MCQMediumJEE 2025
  27. 27The radii of curvature for a thin convex lens are 10 cm and 15 cm respectively. The focal length of the lens is 12 cm. The refractive index…MCQEasyJEE 2025
  28. 28A monochromatic light of frequency 5 × 10¹⁴ Hz travelling through air, is incident on a medium of refractive index '2'. Wavelength of the…MCQEasyJEE 2025
  29. 29Light from a point source in air falls on a spherical glass surface (refractive index, μ = 1.5 and radius of curvature R = 50 cm). The…NVAEasyJEE 2025
  30. 30A lens having refractive index 1.6 has focal length of 12 cm, when it is in air. Find the focal length of the lens when it is placed in…MCQMediumJEE 2025
  31. 31Two thin convex lenses of focal lengths 30 cm and 10 cm are placed coaxially, 10 cm apart. The power of this combination is:MCQMediumJEE 2025
  32. 32A container contains a liquid with refractive index of 1.2 up to a height of 60 cm and another liquid having refractive index 1.6 is added…NVAEasyJEE 2025
  33. 33Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): Refractive index of…MCQEasyJEE 2025
  34. 34A concave-convex lens of refractive index 1.5 and the radii of curvature of its surfaces are 30 cm and 20 cm, respectively. The concave…MCQMediumJEE 2025
  35. 35A convex lens of focal length 30 cm is placed in contact with a concave lens of focal length 20 cm. An object is placed at 20 cm to the…MCQMediumJEE 2025
  36. 36A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal length when immersed in a liquid of refractive index…MCQMediumJEE 2024
  37. 37The distance between an object and its two-times magnified real image produced by a convex lens is 45 cm. The focal length of the lens used…NVAMediumJEE 2024
  38. 38In an experiment to measure the focal length f of a convex lens, the magnitude of object distance x and image distance y are measured with…MCQEasyJEE 2024
  39. 39The following figure represents two biconvex lenses L₁ and L₂ having focal lengths 10 cm and 15 cm, respectively. The distance between L₁…MCQEasyJEE 2024
  40. 40A combination of a thin plano-concave lens and a thin plano-convex lens is used to image an object placed at infinity, so that light…NVAMediumJEE 2023
  41. 41When a beam of white light is allowed to pass through a convex lens parallel to the principal axis, the different colours of light converge…MCQEasyJEE 2023
  42. 42A convex lens of refractive index 1.5 and focal length 18 cm in air is immersed in water. The change in focal length of the lens will be:…NVAMediumJEE 2023
  43. 43A ray of light is incident from air on a glass plate having thickness √3 cm and refractive index √2. The angle of incidence of the ray is…NVAMediumJEE 2023
  44. 44An object is placed on the principal axis of a convex lens of focal length 10 cm as shown. A plane mirror is placed on the other side of…NVAMediumJEE 2023
  45. 45A person has been using spectacles of power -1.0 diopter for distant vision and a separate reading glass of power 2.0 diopters. What is the…MCQMediumJEE 2023
  46. 46A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index 5/3 is poured inside the bucket, then the…MCQEasyJEE 2023
  47. 47A monochromatic light wave with wavelength λ₁ and frequency ν₁ in air enters another medium. If the angle of incidence and angle of…MCQEasyJEE 2023
  48. 48A pole is vertically submerged in a swimming pool, such that it gives a length of shadow 2.15 m within water when sunlight is incident at…NVAMediumJEE 2023
  49. 49A point object, 'O' is placed in front of two thin symmetrical coaxial convex lenses L₁ and L₂ with focal lengths of 24 cm and 9 cm…MCQMediumJEE 2023
  50. 50The radius of curvature of each surface of a convex lens having refractive index 1.8 is 20 cm. The lens is now immersed in a liquid of…MCQMediumJEE 2023
  51. 51As shown in the figure, a plane mirror is fixed at a height of 50 cm from the bottom of tank containing water (μ = 4/3). The height of…NVAMediumJEE 2023
  52. 52An ice cube has a bubble inside. When viewed from one side the apparent distance of the bubble is 12 cm. When viewed from the opposite…MCQEasyJEE 2023
  53. 53Two convex lenses of focal length 20 cm each are placed coaxially with a separation of 60 cm between them. The image of the distant object…NVAMediumJEE 2023

Frequently asked questions

Our bank has 53 previous-year JEE Physics questions tagged to Refraction & Lenses, drawn from JEE papers between 2023 and 2026, including 7 from 2026 alone. Each comes with a full step-by-step solution.

Refraction & Lenses is rated Intermediate overall for JEE Physics. The PYQs on this page break down as 33 medium, 20 easy.

Of the 53 previous-year questions on Refraction & Lenses, 39 are multiple-choice (MCQ) and 14 are numerical-value (NVA) questions.

Based on recent paper analysis, Refraction & Lenses is worth about 3 marks in JEE Main. It sits in Optics, a Class 12 Physics chapter.

More Optics topics

Interference (Young's Experiment)32Prisms & Total Internal Reflection22Reflection & Spherical Mirrors18Diffraction & Polarisation16Optical Instruments (Microscope, Telescope)5Wavefront & Huygens Principle2

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