Interference in Optics

This lecture covers the phenomenon of interference in optics, starting with the analysis of fringes in thin films and spherical lenses. It then delves into the principles of Michelson interferometer, the Michelson-Morley experiment, and the application of interferometry in nano-positioning and spectroscopy. The lecture also explores the Fourier Transform Infrared Spectroscopy (FT-IR) technique, its operation, and applications in biochemistry. Additionally, it discusses the resolution and resolvability of FT-IR, as well as the integrated version of FT-IR for wavelength division multiplexing. Finally, it explains the working principle of Sagnac interferometers and fiber gyroscopes, highlighting their applications in measuring rotations and angular speeds.