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Why is sunlight important?
What does sunlight mean in science?
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What could live on the Sun?
Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere as daylight when the Sun is above the horizon.
4 days ago · Sunlight, solar radiation that is visible at Earth’s surface. The amount of sunlight is dependent on the extent of the daytime cloud cover. Some places on Earth receive more than 4,000 hours per year of sunlight, as in the Sahara; others receive less than 2,000, as in regions of frequent storminess.
- The Editors of Encyclopaedia Britannica
In science, sunlight may be defined as the total frequency spectrum of the electromagnetic radiation that is emitted by the Sun. On earth, the atmosphere filters the sunlight before it touches the surface.
By studying our Sun, scientists can better understand the workings of distant stars. The hottest part of the Sun is its core, where temperatures top 27 million °F (15 million °C). The part of the Sun we call its surface – the photosphere – is a relatively cool 10,000 °F (5,500 °C).
Nov 5, 2020 · The light from the Sun comes from the photosphere; a relatively thin layer, a few hundred km thick. The photosphere of the Sun is in radiative equilibrium, getting neither hotter or colder on average.
Sunlight, also known as solar radiation, refers to the incoming light to the Earth that originated from the Sun. This light represents a portion of the electromagnetic spectrum that includes infrared, visible light, and ultraviolet light.
What kind of light does the Sun emit? Sunlight spectrum above Earth's atmosphere as a function of wavelength. Public Domain Image, image source: Christopher S. Baird, data source: American Society for Testing and Materials Terrestrial Reference. The Sun shines in many ‘colors’ of light.
