5. Define radiation and radiant heat.
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Radiant heat, also known as thermal radiation, is the transfer of electromagnetic radiation which describes the heat exchange of energy by photons. ... Radiant heat is a mechanism for heat transfer which does not require a medium in which it propagates (unlike convection and conduction).
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Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. The kinds of radiation are electromagnetic and particulate . Gamma radiation and x rays are examples of electromagnetic radiation.
Radiant heating and cooling is a category of HVAC technologies that exchange heat by both convection and radiation with the environments they are designed to heat or cool
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