Sunlight

:This article deals with light emitted by the sun, for other meanings see Sunlight (disambiguation)

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Sunlight in the broad sense is the total spectrum of electromagnetic radiation given off by the Sun. On Earth, sunlight is filtered by the atmosphere, and the solar radiation is obvious as daylight when the Sun is above the horizon. This is usually during the hours known as day. Near the poles in summer, sunlight also occurs during the hours known as night and in the winter at the poles sunlight may not occur at any time. When the direct radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and heat. Radiant heat directly produced by the radiation of the sun is different from the increase in atmospheric temperature due to the radiative heating of the atmosphere by the sun's radiation.

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The World Meteorological Organization defines sunshine as direct irradiance from the Sun measured on the ground of at least 120 W·m−2.

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The sun's nuclear energy source was discovered by Hans Bethe.

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Spectrum: :For other senses, including a variety of related meanings in the physical, mathematical, and biological sciences, see spectrum (disambiguation)....

Electromagnetic radiation: Electromagnetic radiation is a propagating wave in space with electric and magnetic components. These components oscillate at right angles to each other and to the direction of propagation....

Sun: :: For the astrological significance of the Sun, see Solar system in astrology....

Sunlight related Images and Photos (experimental)

Sunlight	Sunlight	Sunlight Country	Sunlight Returns II
Tuscan Sunlight I	Living Sunlight Book (Hardcover)	Sunlight on the Coast	Sunlight and Trees I
Sunlight and Trees II	Sunlight on the Poppyfield	Sunlight Reflecting on the Sea	Sunlight on Fresh Snow Wasatch Mt. Range UT