Measurements on the index of refraction of air for wave lengths from 2218 A to 9000 S (1919)
National Bureau of Standards · leaf 21
. This id a 2 cm hole in its center to allow the passage of light through the interferometer. Three small screws in the igc pressed against springs which bore on the interferometer plate facing the flange and permitted the adjustment of the plates to parallelism by varying the pressure on the… … Fig. 3.—Interferon strictly parallel, the entire interferometer mounting was slippedinto a closely fitting brass tube 40 cm long which was surroundedby a bath whose temperature could be regulated at will as de-scribed below. 4. AIR CHAMBER In order to secure an accuracy in n-i of 1 in the fourth…
Light refraction
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