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23 Nov 2019
A Michelson Interferometer is used to measure the refractiveindex of a gas. The gas is allowed to flow into a gas cell oflength "L" placed in one arm of the Interferometer, in which thelight of wavelength "λ" circulates.
a) If "N" fringes are counted as the cell is filled from vacuumto atmospheric pressure, derive an expression for the index ofrefraction of the gas based on the given quantities.
b) How many fringes of 588nm light would count if CO2(n=1.00045) were used and if the cell were 11cm long?
A Michelson Interferometer is used to measure the refractiveindex of a gas. The gas is allowed to flow into a gas cell oflength "L" placed in one arm of the Interferometer, in which thelight of wavelength "λ" circulates.
a) If "N" fringes are counted as the cell is filled from vacuumto atmospheric pressure, derive an expression for the index ofrefraction of the gas based on the given quantities.
b) How many fringes of 588nm light would count if CO2(n=1.00045) were used and if the cell were 11cm long?
Hubert KochLv2
3 Oct 2019
