Grade 12th passWave Optics
Determine the wavelength of sodium sorcre using mechelsons interferometer
Determine the wavelength of sodium sorcre using mechelsons interferometer
1 Answer
Vikas TU
Dear student
Michelson interferometer has been used to determine
the wavelength of the green emission line from a mercury lamp. The
measured wavelength was 549.0(9)nm. Using the known
wavelength of the same line, 546.074nm, the reduction lever of the
interferometer was found to reduce the micrometer travel by a ratio
of 5.026(8):1, rather than the quoted 5:1. Using this calibrated
reduction ratio, the average wavelength of the yellow sodium
doublet was determined to be 589.3(10)nm and the splitting between
the lines forming the doublet was 0.5971(5)nm. These are in
excellent agreement with the literature values of 589.294nm and
0.5974nm, respectively.
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