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At 15:15 5/27/97 -0600, Larry Smith wrote:
I have a related question. Which glass are the prisms we buy from Edmund,
Cenco, Pasco, Fisher, etc.? The catalogs don't say, nor does any
documentation I can find. I'm looking for the index of refraction of the
prisms in a spectroscope experiment.
One measures the angle A of the prism, and delta the angle of minimal
deviation for a selected wavelength, and then the refractive index
relative to air ( mu) is given by
mu = sin 1/2 (A + delta)/sin 1/2 A
But it is misleading to think of two varieties of glass, when in fact
there is a long series of glasses, ( as many as 100 from some suppliers)
with a gradation of dispersion and index due to a variety of metal
oxides...