In this lesson, we will learn how to calculate the characteristics of an interference pattern produced by two beams of light traveling along different paths.
Sample Question Videos
An experimenter detects 251 fringes when the movable mirror in a Michelson interferometer is displaced. The light source used is a sodium lamp, which emits light with a characteristic wavelength of 589 nm. By what distance did the movable mirror move?
What is the distance moved by the traveling mirror of a Michelson interferometer that corresponds to 1,500 fringes passing by a point of the observation screen? Assume that the interferometer is illuminated with a 606 nm spectral line of krypton-86.
A rectangular glass chamber that is 5.08 cm long is inserted into one arm of a Michelson interferometer using a 633 nm light source. This chamber is initially filled with air at standard atmospheric pressure. The air is gradually pumped out using a vacuum pump until the air pressure becomes negligible. How many fringes are observed moving by during the transition?