Question

After obtaining the fringes in Michelson's interferometer with white light, the white light is replaced by sodium
light. When one mirror of the interferometer is now moved through a distance of 0.15 mm the fringe are found
to disappear. If the mean wavelength for the two components of the D lines of sodium light is 5893 Å, find the
difference between their wavelengths.
(a) 5.79 Å
(b) 4.25 Å
(c) 2.25 Å
(d) 7.59 Å​

Answer 1

Answer:

B. 4.25 a

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