Diffraction, interference and gratings

What this note covers

1. Superposition and coherent sources
2. Young’s double-slit fringe spacing
3. Diffraction spreads waves at apertures
4. Gratings create sharp principal maxima
5. Infer wavelength and compare observations
6. Explain patterns and evaluate an optical investigation

6 sections · 10 key terms & formulas · 6 common mistakes