Light Dewpoint

Dew point

The dew point is the temperature that air, of a constant absolute humidity and pressure, must be cooled to in order for the relative humidity to rise to 100%. This temperature is a thermodynamic property that depends on the pressure and water content of the air. When the air at a temperature above the dew point is cooled, its moisture capacity is reduced, and when the temperature passes below the dew point water vapor will condense, or precipitate, to form liquid water. When this occurs through the air's contact with a colder surface, the precipitate on that surface is dew.

Light

Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometers (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the infrared and the ultraviolet, called collectively optical radiation.

light

Noun

1. Electromagnetic radiation in the wavelength range visible to the human eye (about 400–750 nanometers): visible light.
2. Electromagnetic radiation in the wavelength range visible to the human eye or in nearby ranges (infrared or ultraviolet radiation).

Verb

1. To start (a fire).
2. To set fire to; to set burning.

dewpoint

Noun

1. Alternative form of dew point.