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2016-05-28 21:12:01
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Radiation:
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
This includes:
electromagnetic radiation, such as radio waves, visible light, x-rays, and gamma radiation (γ)
particle radiation, such as alpha radiation (α), beta radiation (β), and neutron radiation (particles of non-zero rest energy)
acoustic radiation, such as ultrasound, sound, and seismic waves (dependent on a physical transmission medium)
gravitational radiation, radiation that takes the form of gravitational waves, or ripples in the curvature of spacetime.
여기서 휴대폰은 nonionizing radiation이라고 하네요.
https://en.wikipedia.org/wiki/Radiation