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Objectives:
The objective of this experiment is to explore the pressure changes
that occur when a piston is pulled out of a small syringe and to explain
the properties of the sound pulse.
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Christian Johann Doppler (1803
- 1863) was a Austrian physicist and mathematician who is most
often remembered for his discovery of the Doppler effect,
which is central to modern conceptions of sound and light. His
earliest work concerned mathematics, but in 1842 Doppler
completed and published the paper On the Colored Light of
Double Stars and Certain Other Stars of the Heavens. Within
the work, he proposed that observed frequency of light and
sound waves is dependent upon how fast the source and observer
are moving relative to each other, a phenomenon commonly
referred to as the Doppler effect. He also correctly predicted
that his theory would some day be utilized by astronomers to
more accurately measure the movements and distances of stars.
Most notably, the motions of stars detected through this
manner led to the development of the big bang theory of the
universe. |
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