Class 12 Physics — Chapter 10: Wave Optics
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 12 Physics Chapter 10, "Wave Optics", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Wave Optics" is one of the chapters where numerical problem-solving, derivations and conceptual application really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Wave Optics, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 12 Physics mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Wave Optics (Class 12 Physics)
This chapter treats light as a wave — Huygens' principle, interference (Young's double slit), diffraction, and polarisation.
- Huygens' principle
- Every point on a wavefront acts as a source of secondary wavelets; their envelope gives the new wavefront.
- Interference
- Superposition of coherent waves gives bright (constructive) and dark (destructive) fringes; needs a constant phase relationship.
- Young's double slit
- Fringe width β = λD/d, where d is slit separation and D the screen distance; central maximum is bright.
- Diffraction
- Bending of light around obstacles/slits; a single slit gives a wide central maximum with weaker side maxima.
- Polarisation
- Transverse light can be polarised; Malus's law gives I = I₀cos²θ, confirming the wave's transverse nature.
Key formulas — Wave Optics
💡 Exam tips for Wave Optics
- Interference fringes are equally spaced and equally bright; diffraction maxima get weaker and wider away from the centre.
- Coherent sources (constant phase difference) are essential for a stable interference pattern.
Sample questions
Young's experiment demonstrates:
Two-slit interference pattern.
Fringe width β =
D = screen distance, d = slit sep.
Single-slit diffraction first minimum:
n=1 minimum condition.
Wave Optics — FAQs
What are the key concepts in Class 12 Physics Wave Optics?+
This chapter treats light as a wave — Huygens' principle, interference (Young's double slit), diffraction, and polarisation. Key ideas include Huygens' principle, Interference, Young's double slit, Diffraction, Polarisation.
What does Class 12 Physics Chapter 10 (Wave Optics) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Wave Optics" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Wave Optics" questions free to practise?+
Yes — sign in with Google to practise "Wave Optics" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Wave Optics" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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