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Terrestrial (Earth) Radiation Radiation emitted by Earth is almost entirely long-wave radiation. Most of the terrestrial radiation is absorbed by the water vapor in the atmosphere and some by other gases (about 8 percent is radiated directly to outer space). This radiant energy is reradiated in the atmosphere horizontally and vertically.
Nuclear Radiation. There are three primary radiation types associated with radioactivity. Radioactivity is the spontaneous emission of energy from the nucleus of certain elements, most notably uranium. There are three forms of energy associated with radioactivity; alpha, beta and gamma radiation.The classifications were originally made according to the penetrating power of the radiation, see figure 2.uclear Radiation. There are three primary radiation types associated with radioactivity. Radioactivity is the spontaneous emission of energy from the nucleus of certain elements, most notably uranium. There are three forms of energy associated with radioactivity; alpha, beta and gamma radiation.