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Unformatted text preview: technology switch-over between television/radio broadcasts (over the air to cable) and telephone communication (land-line to cellular) that does affect how much noise and the type of noise we are making. Some searches for extraterrestrial signals are looking for brief optical (visible light) flashes because visible light can travel great distances out of the galactic plane and a tightly-focused beam of light (like a laser) can made to be many times brighter than a star. If the beam of light is pointed our way, we could see it over the glare of the star the extraterrestrials orbit. Also, the higher frequencies of visible light than radio means that a larger amount of information could be transmitted in a given amount of time than with radio. Perhaps the extraterrestrials would use radio signals to make their presence known and use lasers to beam information to us once we have started looking their direction....
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.
- Fall '10