Spectrum lines as light sources in polariscopic measurements (1906)
Bates, Frederick · National Bureau of Standards · leaf 8
color and stability of the sodiumlines up to reversal there is nothing in their favoras a polariscopic source. The flame requires theconstant attention of an assistant, and even in reversal the intensityis not nearly sufficient to permit of the use of the greatest sensibilityof a good polarizing… … Fig. 3. 244 Bulletin of the Bureau of Standards. [Voi. 2, jvo. 2. action. If sufficient care is exercised in preparing the mercury andexhausting the lamps, the five characteristic lines only will beobtained in the visible spectrum and with great intensity. Different observers have found markedly…
Measurements and use of instruments · Light polarisation
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