Question

Determine the wavelength of sodium light by michelson interferometer with reading

Answer 1

Answer:

: A 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.

Explanation: