It is designed to detect gamma rays tens of billions to tens of trillions times more
energetic than visible light.
Not exact matches
(The waves of ultraviolet
light are more
energetic and shorter
than those of
visible light.)
This portion of the spectrum, which is more
energetic than most radio waves yet less
energetic than visible and infrared
light, holds the key to understanding a great variety of fundamental processes, including planet and star formation, and the formation and evolution of galaxies and galaxy clusters in the early Universe.
That the nebula is so much brighter
than the star shows that the star emits primarily highly
energetic radiation of the non-
visible part of the electro - magnetic spectrum, which is absorbed by exciting the nebula's gas, and re-emitted by the nebula, at last to a good part in the
visible light.
Gamma - ray photons are between 10,000 and 10,000,000 times more
energetic than the photons of
visible light when they originate from radioactive atomic nuclei.
The longer infrared rays are less
energetic than visible ones and do not slice through the atmosphere as easily as
visible light.