NDA & NA Exam • Optics Portal
NDA Optics Hub
Select a chapter module to explore high-yield ray optics notes, lens formula sheets, practice drills, and previous years’ UPSC questions.
Chapter 01 • Reflection
Laws of Reflection, Spherical Mirrors, Mirror Formula & Magnification
Chapter 02 • Refraction & TIR
Snell’s Law, Refractive Index, Critical Angle & Optical Fibres
Chapter 03 • Prisms & Dispersion
Prism Formula, Angle of Deviation, Dispersion & Spectrum Formation
Chapter 04 • Lenses & Instruments
Lens Maker’s Formula, Microscopes & Astronomical Telescopes
Chapter 05 • Wave Optics
Huygens’ Principle, Young’s Double Slit & Diffraction Patterns
Chapter 06 • Polarization