(b) The wavelengths of two components of D-lines of sodium are 5890 Å and 5896 Å, respectively. By how much distance one of the mirrors of Michelson's interferometer is to be moved so as to obtain consecutive positions of maximum distinctions?

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Q: The wavelengths of two components of D-lines of sodium are 5890 Å and 5896 Å, respectively. By how…

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A: To resolve the emission line of sodium, the distance travelled by the mirror must be:

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