sodium-line reversal temperature measurement

sodium-line reversal temperature measurement

[¦sōd·ē·əm ‚līn ri¦vər·səl ′tem·prə·chər ‚mezh·ər·mənt] (physics) A method of measuring the temperature of a gas containing sodium vapor, in which the gas is placed in the path of a radiator of known temperature, and the temperature of the gas or the radiator is adjusted until the sodium D line disappears against the background of light from the radiator.