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The radiation principle

In thermodynamics, it is called radiation, or more precisely thermal radiation, one of the three ways, in addition to conduction and convection, of the propagation of heat in space.

Radiation is the transfer of thermal energy between two bodies by means of electromagnetic waves: we experience every day, when we receive the sunlight on the skin, or standing in front of a heat source such as a stove or a fireplace.

The most interesting feature is the radiation heat transfer without direct contact, which can take place without means of propagation and also takes place in a vacuum. For example, the energy of the Sun, in the form of electromagnetic radiation, comes to Earth along interplanetary space.

Radiation is a natural and efficient heat diffusion mechanism, that modern technologies applied to meet a basic human need.


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