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
Worksheet: 13 Questions • 2 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?