thermal_emission has definitions from the field of physics
1
[ noun ] (physics) the emission of electrons from very hot substances

Used in print

(Cornell H. Mayer, "Radio Emission of the Moon...)

The radio_radiation of the sun which is reflected from the moon and planets should be negligible compared with their thermal_emission at centimeter wave_lengths , except possibly at times of exceptional outbursts of solar radio_noise .

Related terms

emission

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