Abstract

The coefficients of reflection of magnesium carbonate and magnesium oxide have been determined for eight mercury lines in the ultraviolet. A spectrometer made up of a Rowland grating furnished a spectrum of light reflected from a part-sphere of the material under test. A photo-multiplier tube received the spectrum. The materials are both good reflectors, the oxide being especially good since it is over 0.90 at all points tested.

© 1948 Optical Society of America

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