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Tomorrow's Doppler's BirthdayFrom: DuBose, Terry (DuboseTerryJ@uams.edu)Fri Nov 28 09:08:12 2008
"In 1845, Christian Doppler <http://www.answers.com/topic/christian-doppler> conducted experiments having musicians play tunes on flatbed railway trains, while people with perfect pitch wrote down the changing notes they heard as the train approached and then receded. This confirmed the findings of a mathematical formula he had come up with three years earlier - the Doppler Effect <http://www.answers.com/topic/doppler-effect> . It shows that the perceived frequency of a sound <http://www.answers.com/topic/sound> , light <http://www.answers.com/topic/light> or radio wave <http://www.answers.com/topic/radio-wave> depends on the speed of the source relative to the observer. Doppler was born on this date in 1803." Christian Andreas Doppler (29 November 1803 - 17 March 1853) was an Austrian <http://en.wikipedia.org/wiki/Austria> mathematician <http://en.wikipedia.org/wiki/Mathematician> and physicist <http://en.wikipedia.org/wiki/Physicist> . He is most famous for what is now called the Doppler effect <http://en.wikipedia.org/wiki/Doppler_effect> , which is the apparent change in frequency <http://en.wikipedia.org/wiki/Frequency> and wavelength <http://en.wikipedia.org/wiki/Wavelength> of a wave <http://en.wikipedia.org/wiki/Wave> as perceived by an observer moving relative to the wave's source. Terry J. DuBose, M.S., RDMS, FSDMS, FAIUM Associate Professor & Director Diagnostic Medical Sonography Program University of Arkansas for Medical Sciences, CHRP 4301 West Markham St. Mail Slot #563 Little Rock, Arkansas, 72205 USA 501-686-6510 or 501-686-5948 DuBoseTerryJ@UAMS.edu <mailto:DuBoseTerryJ@UAMS.edu> http://www.uams.edu/chrp/sonography/ <http://www.uams.edu/chrp/sonography/> http://www.obgyn.net/us/panel/panel.htm <http://www.obgyn.net/us/panel/panel.htm> http://www.io.com/~dubose/ <http://www.io.com/~dubose/> --------------------------------------------------------------- P Please consider the environment before printing this e-mail=20 --------------------------------------------------------------- --------------------------------------------------------------- Confidentiality Notice: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
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