| 单词 | scale height |
| 释义 | > as lemmasscale height scale height n. the vertical distance over which an atmospheric parameter or other quantity decreases by a factor e (= 2·718…). ΘΚΠ the world > space > extension in space > measurable spatial extent > vertical extent > [noun] > over which a quantity decreases by factor e scale height1937 1937 S. Chapman in Rep. Progr. Physics III. 44 H may then be interpreted as a unit of height-measurement relative to which, at the given level, the rate of upward decrease of log p is unity... The term ‘height of the homogeneous atmosphere’ is clearly not appropriate when H varies with height, and the name (local) ‘scale-height’ may be suggested. 1976 Sci. Amer. Mar. 53/1 In the sun or in the earth's atmosphere the size of the dominant energy-carrying cells is on the order of one scale height. 1978 Nature 26 Oct. 726/1 Suppose that 1038 ergs−1 of X rays are emitted by the pulsar... Assume the scale height of the photons is 3 × 108 cm. < as lemmas |
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