出典:Wiktionary
出典:『Wiktionary』 (2026/04/28 12:44 UTC 版)
relative humidity (countable and uncountable, plural relative humidities)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/08 13:28 UTC 版)
Relative humidity is a measurement of the amount of water vapor in a mixture of air and water vapor. It is most commonly defined as the partial pressure of water vapor in the air-water mixture, given as a percentage of the saturated vapor pressure under those conditions. The relative humidity of air thus changes not only with respect to the absolute humidity (moisture content) but also temperature and pressure, upon which the saturated vapor pressure depends. Relative humidity is often used instead of absolute humidity in situations where the rate of water evaporation is important, as it takes into account the variation in saturated vapor pressure.