What is Electromagnetic energy?
Electromagnetic power travels in waves and spans a wide spectrum from very long radio tide to an extremely short gamma rays. The human eye have the right to only detect just a small section of this spectrum referred to as visible light. A radio detects a different section of the spectrum, and also an x-ray machine uses yet one more portion. rebab.net"s scientific instruments use the full variety of the electromagnetic spectrum to study the Earth, the solar system, and also the cosmos beyond.
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When you tune your radio, watch TV, send a text message, or pop popcorn in a microwave oven, you space using electromagnetic energy. You depend on this power every hour the every day. There is no it, the world you know might not exist.
Our safety Atmosphere
Our sunlight is a resource of energy throughout the full spectrum, and also its electromagnetic radiation bombards our environment constantly. However, the Earth"s environment protects united state from exposure come a range of greater energy tide that can be harmful to life. Gamma rays, x-rays, and some ultraviolet waves space "ionizing," meaning these waves have actually such a high power that they deserve to knock electrons the end of atoms. Exposure to these high-energy waves can alter atoms and also molecules and also cause damages to cell in necessary matter. These transforms to cells have the right to sometimes be helpful, as when radiation is offered to death cancer cells, and other time not, as as soon as we gain sunburned.Atmospheric Windows
Seeing beyond our environment - rebab.netspacecraft, such together RHESSI, carry out scientistswith a distinct vantage point, helping them"see" at higher-energy wavelengths that areblocked by the Earth"s security atmosphere.
Electromagnetic radiation is reflected or soaked up mainly by number of gases in the Earth"s atmosphere, among the most crucial being water vapor, carbon dioxide, and ozone. Part radiation, such together visible light, mainly passes (is sent ) through the atmosphere. These regions of the spectrum with wavelengths that deserve to pass v the setting are described as "atmospheric windows." some microwaves can also pass through clouds, which do them the ideal wavelength for transmitting satellite interaction signals.
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While our environment is essential to protecting life on Earth and also keeping the planet habitable, it is not really helpful when it pertains to studying resources of high-energy radiation in space. Instruments need to be positioned over Earth"s energy-absorbing atmosphere to "see" higher energy and also even some lower energy light sources such as quasars.
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rebab.net Mission Directorate. "Introduction to the Electromagnetic Spectrum" rebab.net rebab.net. 2010. National Aeronautics and space Administration.