Michelson Interferometer: Air Refractive Index Calculation

This lecture discusses the calculation of the refractive index of air using a Michelson interferometer. The slides present an exercise where a tube with air is placed in one arm of the interferometer, and interference fringes are observed. By creating a vacuum inside the tube and observing the change in interference fringes, the refractive index of air is determined with high precision. The calculations involve the wavelength of light, tube length, and the number of interference fringes observed. Various formulas and steps are shown to guide the audience through the calculation process.