Electromagnetic Radiation

Only a fraction of the radiation coming from space can pass through the Earth’s atmosphere, namely visible light and the adjoining infrared and UV radiation. This means that the thinner the atmosphere, the more ultimately reaches the surface of the Earth. That is why the large terrestrial telescopes are located on high mountain peaks. On the other hand if information is required from the shorter wave radiation range (e.g. X-ray light) or the longer wave (e.g. far infrared or microwaves), then it is necessary to go outside the Earth’s atmosphere completely to carry out the measurements from an aircraft, a captive balloon or satellites.
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