| 释义 |
Nichols radiometer
Nichols radiometer[′nik·əlz ‚rād·ē′äm·əd·ər] (engineering) An instrument, used to measure the pressure exerted by a beam of light, in which there are two small, silvered glass mirrors at the ends of a light rod that is suspended at the center from a fine quartz fiber within an evacuated enclosure. Nichols radiometer
Nichols radiometer An obsolete device formerly used to semi-quantify radiation intensity by measuring the torsional effect of ionisation on quartz fibres. |