Physics - Ray Optics
Practise 7 IAT (IISER) previous year questions on Ray Optics, compiled from papers spanning 2017 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 IAT (IISER) tests.
Ray Optics has been asked in 6 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 7 questions in all. 0% of them were easy, 57% moderate and 43% tough. Most of its questions came from 2026, with 1 question that year. In the last three years (2023–2026) it had 3 questions across 3 papers, about 1 per paper.
The chapter's 5 topics are not weighted equally: Lens Formula, Refraction of light from curved surface (2 questions, 29%), Refraction of light from plane surface (2 questions, 29%), and Prism and Dispersion of Light (1 question, 14%) have been asked the most. Lens Formula, Refraction of light from curved surface has also led over the last five years, with 2 questions. Lens Formula, Refraction of light from curved surface has produced the most tough questions (1).
- 1A spherical concave mirror of focal length 10 cm and a double convex lens of focal length 5 cm are arranged on the common principal axis as 2026Combination of Lens and Mirrors
- 2Consider an equilateral prism of refractive index 1.5 and a parallelepiped block of refractive index 2.0 arranged as shown in the figure suc2025Refraction of light from plane surface
- 3The refractive indices of two transparent slabs are 2 and . They are attached together and placed in a third transparent medium of refractiv2024Refraction of light from plane surface
- 4An object is placed in front of a convex lens. A real inverted image of double its size is formed. When the object is moved closer to the le2023Lens Formula, Refraction of light from curved surface
- 5A thin lens made of material of refractive index forms the image at the position of a point object held at on the central axis of the lens, 2022Lens Formula, Refraction of light from curved surface
- 6What is the maximum angle of incidence in the figure for which the ray would satisfy the condition for total internal reflection at the boun2020Critical angle and total internal reflection
- 7If the refractive index of the material of a prism is and its angle of minimum deviation is then the angle of the prism is2017Prism and Dispersion of Light
Frequently Asked Questions
1.How many questions are available for Ray Optics?
This chapter includes 7 questions compiled from IAT (IISER) papers spanning 2017 to 2026.
2.Are these questions only from IAT (IISER), or from other exams too?
These are IAT (IISER) 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 IAT (IISER) Physics?
Ray Optics has appeared in 7 of the 10 years of IAT (IISER) papers covered here, with 7 questions across 7 papers - about one per paper it appears in.
4.What is the difficulty level of Ray Optics questions in IAT (IISER)?
Of the 7 questions analysed for this chapter, 0% are easy, 57% moderate and 43% tough. 2026 had the most, with 1 question.
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 - 2 questions (29%)
- Refraction of light from plane surface - 2 questions (29%)
- Prism and Dispersion of Light - 1 question (14%)
- Lens Formula, Refraction of light from curved surface has produced the most tough questions (1).
6.Is Ray Optics's weightage in IAT (IISER) going up or down?
Across all 7 papers analysed, Ray Optics has averaged about 1.0 questions per paper. In the last three years (2023–2026), that average has stayed about the same, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.