Part III: Optics
Optics is the study of light and its interactions with matter. Building on the wave nature of electromagnetic radiation, we explore polarization, interference, and diffraction — phenomena that reveal the wave character of light and underpin modern technologies from fiber optics to laser spectroscopy.
Part Overview
Part III brings together the wave theory developed in Parts I and II to explain the rich phenomenology of optics. We study how the vector nature of light gives rise to polarization, how superposition produces interference patterns, and how obstacles and apertures cause diffraction. These topics form the foundation of modern photonics and optical engineering.
Key Topics
- \(\bullet\) Polarization states: linear, circular, and elliptical
- \(\bullet\) Jones matrices and Stokes parameters
- \(\bullet\) Young's double-slit experiment and thin-film interference
- \(\bullet\) Michelson and Fabry-Perot interferometers
- \(\bullet\) Fraunhofer and Fresnel diffraction
- \(\bullet\) Diffraction gratings and resolving power
- \(\bullet\) The Airy pattern and the Rayleigh criterion
3 chapters | Wave optics in full | Bridges to quantum optics
Chapters
Chapter 7: Polarization
Linear, circular, and elliptical polarization; Jones vectors and matrices; Stokes parameters; Malus's law; birefringence and wave plates.
Chapter 8: Interference
Young's double-slit experiment, thin-film interference, Michelson interferometer, Fabry-Perot interferometer, and temporal and spatial coherence.
Chapter 9: Diffraction
Huygens-Fresnel principle, Fraunhofer diffraction from single and double slits, circular aperture (Airy pattern), diffraction gratings, and resolution limits.