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Radiation is the energy
emission or transmission that is in the form of electromagnetic
waves or electromagnetic particles. As is known, atoms create
the base structure of element. And atom is formed by a core that
is formed by proton and neutrons and electrons that are rotating
around this core.
In any material, if the
number of neutrons is greater than the number of proton, this
kind of materials show an unstable structure and neutrons in
their core burst by emitting rays such as alpha, beta, gamma.
The materials that are
emitting such rays to their environment are called as
radioactive material and rays that are emitted to the
environment is called as radiation.
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