Originally: an instrument for measuring the heating power of the sun's radiation. Later more widely: one for measuring the intensity of solar…
单词 | θ72685 |
释义 | the world > matter > properties of materials > temperature > heat > [noun] > measurement of heat > instrument > for measuring radiant heat > specific (4) actinometer1833 Originally: an instrument for measuring the heating power of the sun's radiation. Later more widely: one for measuring the intensity of solar… pyrheliometer1841 An instrument for measuring solar radiation incident on the earth (the solar constant). radiograph1880 An instrument for measuring and recording the duration and intensity of sunshine. Cf. heliograph, n. 3. Now disused. bolometer1881 An electrical instrument of great sensitiveness for measuring radiant heat. |
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