Abstract

Continuing the work reported in the first paper in this series, Verdet constants have been measured over the spectral range 3635 A to 9875 A for 15 more gases. These include 3 noble gases, 7 hydrocarbons, and 5 other gases. For comparison purposes and also because of a 1% error in the original measurements, the 7 gases first reported on are also listed here.

Save in the case of oxygen, the dispersion curves do not differ greatly from the inverse-square-of-the-wavelength law, the largest departure being shown by xenon, carbon monoxide, acetylene, and ethylene. The Verdet values for about half the gases fit either the modified Becquerel equation or the Serber equation, neon showing somewhat less agreement than the others. Oxygen remains a notable exception, whose Faraday dispersion cannot yet be satisfactorily explained by theory.

© 1956 Optical Society of America

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