单词 | Nichols radiometer |
释义 | Nichols radiometer [`nik·ǝlz ´rād·ē`äm·ǝd·ǝr] 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. |
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