单词 | photovisual magnitude |
释义 | photovisual magnitude [¦fōd·ō`vizh·ǝ·wǝl `mag·nǝ´tüd] ASTRONOMY The magnitude of a star, obtained by measuring the size of the star's image on an isochromatic photographic emulsion, using a filter transmitting only the longer wavelengths between 500 and 600 nanometers; nearly identical with visual magnitude. |
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