1151

Physics Ray Optics Level: High School

A Michelson interferometer is used to measure the wavelength of light emitted from a monochromatic source. As the adjustable mirror is slowly moved through a distance DA = 0.0265 mm , an observer counts 411 alternations between bright and dark fields . What is the wavelength of the monochromatic light used in this experiment ? a. 193 nm b. 227 nm c. 258 nm d. 346 nm e. 369 nm.