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Physics

Ray Optics and Optical Instruments

A Physics chapter of the NEET syllabus, and how to practise it for the computer-based exam.

Exam rules change between cycles. Confirm dates, syllabus and pattern against NTA's official site. We are not NTA.

Weightage: what the paper actually did

Ray Optics and Optical Instruments carried 5 questions in the NEET 2026 paper. One paper is a data point, not a destiny: NTA moves weight between chapters every cycle, which is why the weightage tables deserve care. The stable facts are the paper's shape: 180 questions, 720 marks, +4 right, −1 wrong.

Sample PYQs from this chapter

Real questions NTA asked from Ray Optics and Optical Instruments, with the answer and the working. Try before you peek.

Question 1 · NEET 2020

Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of a telescope whose objective diameter is 2 m is
  1. A.1.83 * 10−^{-}7^{7} rad
  2. B.7.32 * 10−^{-}7^{7} rad
  3. C.6.00 * 10−^{-}7^{7} rad
  4. D.3.66 * 10−^{-}7^{7} rad
Answer and explanation

Answer: D

The limit of resolution θ\theta for a telescope is given by θ=1.22λD\theta = 1.22 \frac{\lambda}{D}. Substituting the values, θ=1.22600∗10−92=3.66∗10−7 rad\theta = 1.22 \frac{600 * 10^{-9}}{2} = 3.66 * 10^{-7}\ rad. Chapter: Ray Optics and Optical Instruments.

Question 2 · NEET 2020

The Brewsters angle iᵦ for an interface should be
  1. A.30° < iᵦ < 45°
  2. B.45° < iᵦ < 90°
  3. C.iᵦ = 90°
  4. D.0° < iᵦ < 30°
Answer and explanation

Answer: B

Brewster's angle ibi_b is given by tan⁡ib=μ\tan i_b = \mu, where μ\mu is the refractive index of the second medium with respect to the first. Since μ>1\mu > 1, ibi_b must be greater than 45° but less than 90°. Chapter: Ray Optics and Optical Instruments.

How to practise Ray Optics and Optical Instruments

Chapter by chapter, against real past-paper questions, on a screen: NEET is computer based from 2027. Read the chapter once, then attempt its PYQs until your accuracy stops climbing, and let the wrong answers tell you which lines to reread. If the chapter keeps refusing to stick, that has its own guide. There is also a free NEET mini mock with answers.

Nearby Physics chapters

Questions

How many questions did Ray Optics and Optical Instruments have in NEET 2026?

Ray Optics and Optical Instruments carried 5 questions in the NEET 2026 paper. Weightage shifts between cycles, so treat it as a probability, not a promise.

Where can I practise Ray Optics and Optical Instruments PYQs for NEET?

Explore available chapter-wise NEET practice in BrainIt, free until the 2027 exam. Review explanations and track chapter accuracy to guide your revision. Sample questions from this chapter are on this page.

Is Ray Optics and Optical Instruments important for NEET 2027?

It is part of the Physics syllabus the paper draws from, and NEET 2027 is computer based, so practise it on a screen. Your own accuracy in the chapter matters more than any weightage table: a heavy chapter you already score well on needs less time than a light one you keep missing.

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