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cosmic background radiation |
Also found in: Dictionary/thesaurus, Acronyms, Wikipedia, Hutchinson | 0.01 sec. |
cosmic background radiationElectromagnetic radiation, mostly in the microwave range, believed to be the highly redshifted residual effect (see redshift) of the explosion billions of years ago from which, according to the big-bang model, the universe was created. It was discovered by accident in 1964 by Robert W. Wilson and Arno Penzias; its presence supports the predictions of big-bang cosmology. cosmic background radiation [′käz·mik ¦bak‚grau̇nd ‚rād·ē‚ā·shən] (astronomy) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| This chart includes all known ranges of EMR including: gamma rays, X-rays, ultraviolet light, visible light, infrared, microwaves, radio waves (ULF, VLF, LF, MF, HF, long, short, HAM, VHF, UHF, SHF, EHF), cosmic microwave background radiation and brain waves, all organized by octaves. It wasn't until the mid-1960s that scientists using radio astronomy discovered cosmic microwave background radiation and pushed the Big Bang theory into prominence. Before that, the universe was so hot that there were no neutral atoms, only ions and electrons that trapped the cosmic microwave background radiation. |
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