What is Electromagnetic energy?
Electromagnetic energy travels in waves and also spans a wide spectrum from an extremely long radio waves to an extremely short gamma rays. The person eye can only detect only a small section of this spectrum called visible light. A radio detects a different section of the spectrum, and also an x-ray machine uses yet one more portion. ubraintv-jp.com"s scientific instruments use the full range of the electromagnetic spectrum to examine the Earth, the solar system, and the universe beyond.
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When you song your radio, watch TV, send a text message, or pop popcorn in a microwave oven, you room using electromagnetic energy. You count on this energy every hour the every day. There is no it, the civilization you know might not exist.
Our safety Atmosphere
Our sunlight is a resource of energy across the complete spectrum, and also its electromagnetic radiation bombards our setting constantly. However, the Earth"s atmosphere protects united state from exposure come a selection of higher energy tide that deserve to be harmful come life. Gamma rays, x-rays, and also some ultraviolet waves room "ionizing," definition these waves have such a high energy that they have the right to knock electrons out of atoms. Exposure to this high-energy tide can transform atoms and also molecules and cause damages to cells in necessary matter. These transforms to cells can sometimes it is in helpful, as when radiation is used to kill cancer cells, and also other time not, as once we acquire sunburned.Atmospheric Windows
Seeing past our atmosphere - ubraintv-jp.comspacecraft, such as RHESSI, administer scientistswith a distinct vantage point, helping them"see" in ~ higher-energy wavelengths that areblocked through the Earth"s protective atmosphere.
Electromagnetic radiation is reflect or soaked up mainly by number of gases in the Earth"s atmosphere, among the most necessary being water vapor, carbon dioxide, and also ozone. Part radiation, such together visible light, mostly passes (is transmitted) with the atmosphere. These areas of the spectrum v wavelengths that deserve to pass v the environment are referred to as "atmospheric windows." some microwaves can also pass through clouds, which make them the best wavelength because that transmitting satellite communication signals.
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While our environment is essential to protecting life top top Earth and also keeping the planet habitable, the is not really helpful as soon as it pertains to studying sources of high-energy radiation in space. Instruments need to be positioned above Earth"s energy-absorbing environment to "see" greater energy and even part lower energy light resources such together quasars.
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ubraintv-jp.com Mission Directorate. "Introduction come the Electromagnetic Spectrum" ubraintv-jp.com ubraintv-jp.com. 2010. Nationwide Aeronautics and space Administration.