Optics breaks into ray optics (Class 12 first half) and wave optics (Class 12 second half). Ray optics is mostly lens/mirror formula application: 1/v − 1/u = 1/f, magnification, refraction at curved surfaces. Wave optics covers Young's double slit (fringe width, intensity), diffraction, polarization, and Brewster's angle. NEET wave optics questions are largely numerical — memorize the standard formulas and you'll answer in under a minute each.
NCERT chapters to cover
- 📘Class 12 Ch 9: Ray Optics and Optical Instruments
- 📘Class 12 Ch 10: Wave Optics
Exam tips
- 1Sign convention for mirrors and lenses is the most common source of mistakes — drill it until automatic.
- 2Young's double slit: β = λD/d. The single most-asked formula in wave optics.
- 3Total internal reflection: critical angle sin C = 1/μ.
Practice Optics
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FAQ
How many Optics questions come in NEET?▾
Based on NEET past papers from 2018–2025, Optics typically delivers 3–5 questions per year.
Which NCERT chapters cover Optics?▾
For NEET Optics, study Class 12 Ch 9: Ray Optics and Optical Instruments; Class 12 Ch 10: Wave Optics.
What's the best way to prepare Optics for NEET?▾
Sign convention for mirrors and lenses is the most common source of mistakes — drill it until automatic. Young's double slit: β = λD/d. The single most-asked formula in wave optics.