Dew
From Free net encyclopedia
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- This article is about the state of water. For the system for detecting ballistic missiles, see Distant Early Warning system.
Dew is water in the form of droplets that appear on thin, exposed objects in the morning or evening. As the exposed surface cools by radiating its heat to the sky, the rate at which atmospheric moisture evaporates from the surface drops below that at which it condenses on the surface from the air, so that droplets are formed.
When temperatures are low enough, dew takes the form of ice; this form is called frost.
As dew is related to the temperature of surface, in late summer it is formed most easily on surfaces which are not warmed by conducted heat from deep ground, such as railings, car roofs and bridges.
Culturally, dew is often associated with purity and freshness. This is evidenced by the names of certain popular beverages such as Mountain Dew and Sierra Mist.
See also
da:Dug (vand) de:Tau (Niederschlag) fr:Rosée he:טל nl:Dauw ja:露 pl:Rosa ru:Роса fi:Kaste (sääilmiö) vi:Sương zh:露水