The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in which part of the electromagnetic spectrum? The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in which part of the electromagnetic spectrum? radio visible X-ray gamma ray ultraviolet

Very hot objects of a million K or more emit their radiation mainly in gamma and X-rays while cooler objects emit photons with longer wavelengths, such as infrared or radio waves.

Explanation:

SOURCES OF GAMMA RAYS

Gamma rays have the smallest wavelengths and the most energy of any wave in the electromagnetic spectrum. They are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and regions around black holes.