When constructing a Rayleigh Refractometer the formula for the refractive index of a gas at pressure P and temperature T is:(adsbygoogle = window.adsbygoogle || []).push({});

mu(P,T) - 1 = (gamma) P/T

where,

mu(P,T) = refractive index as a function of pressure and temperature

and

gamma = [n(lambda)Ta]/[L(deltaP)]

where,

n = fringe number

lambda = wavelength

Ta = Ambient room Temperature

L = length of tube containing the gas

and

deltaP = change in pressure causing the movement in fringes.

My question is how do you prove gamma??? - I cannot find this in any physics/optics book.

Any suggestions on where to start or look will be good.

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# Rayleigh Refractometer index of refraction

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