Wave Optics is a Class 12 Physics chapter that carries about 3.1% of the Physics questions in NEET. Practise it with 43 questions covering 2 topics, each with an explanation.
Sets of 15 questions that adapt to your level, with an explanation for every answer.
Across the 13 previous year papers, Wave Optics had 21 questions, about 1.6 a year. The most in one paper was 3, in NEET 2017.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 2 |
| NEET 2025 | 2 |
| NEET 2024 | 2 |
| NEET 2023 | 1 |
| NEET 2022 | 1 |
| NEET 2021 | 0 |
| NEET 2020 | 1 |
| NEET 2019 | 1 |
| NEET 2018 | 2 |
| NEET 2017 | 3 |
| NEET 2016 | 2 |
| Re-AIPMT 2015 | 2 |
| AIPMT 2014 | 2 |
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
According to Malus's law, when a polarised beam of intensity I₀ passes through an analyser at 60° to its axis, the transmitted intensity is:
Answer: B. I₀/4
Why: I = I₀cos²60° = I₀/4.
In a double slit experiment, the slits are 0.5 mm apart, the screen is 1 m away and the wavelength is 500 nm. The fringe width is:
Answer: B. 1 mm
Why: β = λD/d = 500 × 10⁻⁹ × 1/(0.5 × 10⁻³) = 10⁻³ m.
According to Malus's law, when polarized light of intensity I0 passes through an analyzer at angle θ to the polarizer's axis, the transmitted intensity is:
Answer: B. I0 cos²θ
Why: Malus's law: I = I0 cos²θ, where θ is the angle between the polarizer and analyzer axes.
When light passes from air into glass, which of its properties does NOT change?
Answer: C. frequency
Why: Frequency is fixed by the source; speed and wavelength both decrease in the denser medium.
Polaroid sunglasses reduce glare because:
Answer: D. the light reflected from roads and water is partially polarised, and the lenses block that component
Why: The reflected glare is mostly horizontally polarised and the lenses are oriented to cut it off.
The colours seen in a thin soap film are due to:
Answer: B. interference of light reflected from its two surfaces
Why: The path difference depends on the thickness and the wavelength.
Sound waves in air cannot be polarised because they are:
Answer: B. longitudinal
Why: A longitudinal wave has vibrations along the direction of propagation only.
Two coherent sources have intensities in the ratio 9 : 1. The ratio of the maximum to the minimum intensity in the interference pattern is:
Answer: C. 4 : 1
Why: Amplitudes are in the ratio 3 : 1. I_max/I_min = ((3 + 1)/(3 − 1))² = 4.
Wave Optics carries about 3.1% of the Physics questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 21 times, about 1.6 questions a year.
Wave Optics is a Class 12 Physics chapter in the NCERT syllabus.
NeetVictory has 43 practice questions on Wave Optics, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.
NeetVictory