Emission

This is the creation of electromagnetic radiation generally produced as a result of the interactions between the molecules or atoms in the atmosphere with very high energy photons from very short wavelength radiation. These interactions raise either the molecular or atomic state of the gas or particulate matter above its normal ground state and as a result, the gas or particle can emit a longer wavelength of radiation. This emitted radiation is the result of the gas or particle reverting back to its original ground state.

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