a. Repeat problem 1 when the light is the green mercury line of 546.1 nm with a linewidth of 0.025 nm.
b. How far can the mirror be moved from zero path difference so that fringe visibility is at least 0.85?
Problem 1
A Michelson interferometer forms fringes with cadmium red light of 643.847 nm and linewidth of 0.0013 nm. What is the visibility of the fringes when one mirror is moved 1 cm from the position of zero path difference between arms? How does this change when the distance moved is 5 cm? At what distance does the visibility go to zero?
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