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The Electromagnetic Spectrum (ES) Is a different types of radiation. This is a band of measured waves, beginning at the radio waves, infra red waves, the visible "light" waves, ultra violet waves, x-ray waves and gamma ray waves. Cosmic rays aren't included in the ES because they are not radiation, but instead are high-energy charged particles that travel through space at nearly the speed of light.
Their extremely high energies are comparable to those of gamma rays at
the upper end of the electromagnetic spectrum. The highest energy cosmic
rays originate outside our galaxy and provide information on distant objects
such as quasars. Cosmic rays are detected when they hit the upper atmosphere,
creating showers of particles in their interaction with atoms. These secondary
particles can then be detected by instruments on the ground.
Towards the center of the ES band, is a tiny segment known as "light" waves, which are still electromagnetic in form, and these light waves are the only visible light that the human eye can "see". The human eye can perceive a range of 3,600 to 7,600 angstrom units. Aboveor below that, the electromagnetic waves can not be seen. It is this very small segment of wave frequencies that we can see and hear, that makes other non-seen worlds plausible. We could quite possible be overlapping other worlds where we could not see them, or they us. |
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