Energy of sun. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Alternative energy sources
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solar is the source of life on our planet. The sun heats the atmosphere and the surface of the earth. Thanks to solar energy, winds blow, the water cycle is carried out in nature, the seas and oceans heat up, plants develop, animals have food. It is thanks to solar radiation that fossil fuels exist on Earth. Solar energy can be converted into heat or cold, driving force and electricity.
Solar radiation - this is electromagnetic radiation, concentrated mainly in the wavelength range of 0,28 ... 3,0 microns. The solar spectrum consists of:
- ultraviolet waves with a length of 0,28 ... 0,38 microns, invisible to our eyes and constituting approximately 2% of the solar spectrum;
- light waves in the range of 0,38 ... 0,78 microns, constituting approximately 49% of the spectrum;
- infrared waves with a length of 0,78 ... 3,0 microns, which account for most of the remaining 49% of the solar spectrum.
The remaining parts of the spectrum play an insignificant role in the heat balance of the Earth.
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