Formula for calculating wavelength of light in Michelson interferometer is

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A. X = mλ
B. X =1/2 mλ
C. X = 2mλ
D. X = 4mλ

B. X =1/2 mλ

or λ = 2D / n

where:

  • λ (lambda) is the wavelength of light
  • D is the distance moved by the mirror (one arm of the interferometer)
  • n is the number of fringes observed
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