National Aeronautics and Space Administration. "Introduction to the Electromagnetic Spectrum" NASA Science. Retrieved, from NASA Science website: MLA Introduction to the Electromagnetic Spectrum. National Aeronautics and Space Administration, Science Mission Directorate. Two principal measures of the ERG waveform are taken: 1) The amplitude (a) from the baseline to the negative trough of the a-wave, and the amplitude of the b-wave measured from the trough of the a-wave to the following peak of the b-wave and 2) the time (t) from flash onset to the trough of the a-wave and the time (t) from flash onset to the. Top of Page | Next: Anatomy of an Electromagnetic Wave Instruments have to be positioned above Earth's energy-absorbing atmosphere to "see" higher energy and even some lower energy light sources such as quasars. While our atmosphere is essential to protecting life on Earth and keeping the planet habitable, it is not very helpful when it comes to studying sources of high-energy radiation in space. These regions of the spectrum with wavelengths that can pass through the atmosphere are referred to as "atmospheric windows." Some microwaves can even pass through clouds, which make them the best wavelength for transmitting satellite communication signals. Some radiation, such as visible light, largely passes (is transmitted) through the atmosphere. Seeing Beyond our Atmosphere - NASAspacecraft, such as RHESSI, provide scientistswith a unique vantage point, helping them"see" at higher-energy wavelengths that areblocked by the Earth's protective atmosphere.Įlectromagnetic radiation is reflected or absorbed mainly by several gases in the Earth's atmosphere, among the most important being water vapor, carbon dioxide, and ozone.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |