In a Michelson interferometer, a laser beam is split into two beams as shown in the figure.When the two beams are combined, an interference pattern is seen on the observationscreen. The interference pattern is a series of concentric bright circles separated by darkones as shown in the figure. At the center of the pattern is a bright circular spot. Supposethe movable mirror is slowly moved toward the beam splitter by distance 1/2. As this isdone, what happens to the interference pattern? a) There is no change in the interferencepattern. b) The interference pattern becomes brighter, but otherwise remains the same.c) The central bright spot turns into a dark spot (B → D). d) The central bright spot turnsinto a dark spot and then back into a bright spot (B → D → B). e) The central bright spotturns into a dark spot, then into a bright spot, and then back into a dark spot (B → D →B → D).Fixed MirrorBeamSplitterMovableLASERMirroraObservation Screen

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Answered: In a Michelson interferometer, a laser…

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