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Ceramic/Stoneware mug cup What is called the radiation heat transfer?

Ceramic Mug    From:Xinxiang Ceramic Mug Manufacturers    
Ceramic/Stoneware mug cup

The radiation heat transfer is a kind of mode of heat transfer is completely different from the conduction, convection heat transfer properties. Conduction, convection heat transfer must rely on a medium (solid or liquid), the radiation heat transfer can not rely on any heat transfer medium, but directly to the heat ray form to transfer heat. For example, there is close to the vacuum of space between the earth and the sun, but the sun still can Everfount to heat radiation to the earth. In order to study thermal effects of the solar spectrum, the British astronomer He Xie ear in one eight hundred years have done such an experiment: distribution by using a sensitive mercury thermometer measuring solar heat. When the thermometer is moving from violet red light, indicating increased gradually. When the invisible part of the thermometer to red outside, accidentally discovered the regional temperature higher than the red light district. Put the thermometer moving outward, the thermometer instructions to continue to rise, after a high point, gradually reduce down. This clearly shows that the heat of the sun, rely mainly on the red wavelength longer than the invisible infrared light -- spread.
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