A Michelson interferometer using light of wavelength, λ, has been adjusted to produce a bright spot...
A Michelson interferometer using light of wavelength, λ, has been adjusted to produce a bright spot at the center of the interference pattern. Mirror M1 is then moved a distance λ toward the beam splitter, and then mirror M2 is moved a distance λ away from the beam splitter. How many bright-dark fringe shifts are observed?
The answer is 4 I just need an explanation of why
Homework Answers
If 
=
/2,
then the interference pattern changes from bright to dark back to
bright (a fringe shift)
We can see 2 shifts when mirror 1 moves by
and
2 shifts when mirror 2 moves by ,
Therefore total is 4.
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need help with this Electromagnetic Waves homework
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