Ray Optics has 90 questions in JEE Main papers from 2020 to 2025, about 15 per year across all shifts. The most asked topic is Lenses (29 questions), followed by Prism and Dispersion (16) and Refraction and Snell's Law (15).
Updated
| Year | Questions | |
|---|---|---|
| 2025 | 20 | |
| 2024 | 13 | |
| 2023 | 19 | |
| 2022 | 16 | |
| 2021 | 12 | |
| 2020 | 10 |
| Topic | Questions | Share of chapter | Last asked |
|---|---|---|---|
| Lenses | 29 | 32% | 2025 |
| Prism and Dispersion | 16 | 18% | 2025 |
| Refraction and Snell's Law | 15 | 17% | 2025 |
| Optical Instruments | 11 | 12% | 2023 |
| Reflection and Mirrors | 9 | 10% | 2025 |
| Total Internal Reflection | 6 | 7% | 2024 |
| Refraction at Spherical Surface | 4 | 4% | 2025 |
JEE Main 2025 · 8 Apr · Shift 2 · Lenses
A 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 left of this lens system. The distance of the image from the lens in cm is ________.
15
45
30
Answer: (B)
Step-by-step solutionJEE Main 2025 · 7 Apr · Shift 2 · Refraction and Snell's Law
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Refractive index of glass is higher than that of air.
Reason (R): Optical density of a medium is directly proportionate to its mass density which results in a proportionate refractive index.
In the light of the above statements, choose the most appropriate answer from the options given below:
Both (A) and (R) are correct and (R) is the correct explanation of (A)
(A) is correct but (R) is not correct
(A) is not correct but (R) is correct
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
Answer: (B)
Step-by-step solutionJEE Main 2025 · 7 Apr · Shift 2 · Reflection and Mirrors
A mirror is used to produce an image with magnification of . If the distance between object and its image is 40 cm, then the focal length of the mirror is ________.
10 cm
12.7 cm
10.7 cm
15 cm
Answer: (C)
Step-by-step solutionJEE Main 2025 · 3 Apr · Shift 1 · Prism and Dispersion
Consider following statements for refraction of light through prism, when angle of deviation is minimum.
A. The refracted ray inside prism becomes parallel to the base.
B. Larger angle prisms provide smaller angle of minimum deviation.
C. Angle of incidence and angle of emergence becomes equal.
D. There are always two sets of angle of incidence for which deviation will be same except at minimum deviation setting.
E. Angle of refraction becomes double of prism angle.
Choose the correct answer from the options given below :
Answer: (D)
Step-by-step solutionJEE Main 2024 · 8 Apr · Shift 1 · Total Internal Reflection
Critical angle of incidence for a pair of optical media is . The refractive indices of first and second media are in the ratio:
Answer: (D)
Step-by-step solutionJEE Main 2023 · 8 Apr · Shift 1 · Optical Instruments
In a reflecting telescope, a secondary mirror is used to:
Answer: (D)
Step-by-step solutionAll 90 questions are in the free PDF above, grouped by topic.
90 questions from 2020 to 2025, about 15 per year. In 2025 it had 20.
By past papers: Lenses (32%), Prism and Dispersion (18%) and Refraction and Snell's Law (17%) of all Ray Optics questions.
Yes. The PDF, the answer key and every step-by-step solution on PrepWiser are free, with no login needed to practise.
JEE Main PYQs by year: 2025 · 2024 · 2023 · 2022 · 2021 · 2020
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