MicrowaveOpt

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Microwave Microwave Telescopes Telescopes 100’s of free ppt’s from www.pptpoint.com library
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Discovery (domestic use) Microwaves have wavelengths range from centimeters to those closer to a foot in length. •Longer are for heating food. Shorter waves Doppler radar •Microwaves were first utilized by British the 1940s during WWII. Sir John Randall and Dr. H. A. Boot, invented a device called a magnetron (Radar) using microwaves to detect Nazi warplanes. •1945, examining the magnetron, Percy Spencer’s candy bar melted •Product was marketed, thank goodness Percy was a chocolate lover! www.sabers.org/STELLA %20CANDY%20BAR.JPG
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C osmic M icrowave B ackground (CMB) 1960's at scientists at Bell Laboratories detected background noise using a special “low noise” antenna. This static noise came from every direction and did not vary in intensity. The scientists soon realized they had discovered the cosmic microwave background radiation. “This radiation, which fills the entire Universe, is believed to be a clue to it's beginning, something known as the Big Bang.”
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Big Bang Model Universe was once much smaller, hotter, and denser Based off of Einstein’s theory of general relativity Expansion of the universe – 1929 Lightest elements Deuterium, helium, lithium CMB oldwww.internet2.edu/apps/html/archives.html
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What the CMB tells us about the Universe The geometry of the universe Whether the universe will expand or collapse How much matter there is in the universe Amount and nature of dark matter and energy Expansion rate of the universe Age of the universe The origins of galaxies and galaxy clusters
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Origins of the CMB Universe cooled as expanded – became less
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MicrowaveOpt - 100s of free ppts from www.pptpoint.com...

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