Direct quantitative measurements of Doppler effects for sound sources with gravitational acceleration

Details Direct quantitative measurements of Doppler effects for sound sources with gravitational acceleration Direct quantitative measurements of Doppler effects for sound sources with gravitational acceleration

2009-11-19

arxiv.org/abs/0911.3819v1

Physics

Physics Education

9 pages, 6 figures

Scientific paper

We explain simple laboratory experiments for making quantitative measurements of the Doppler effect from sources with acceleration. We analyze the spectra and clarify the conditions for the Doppler effect to be experimentally measurable, which turn out to be non-trivial when acceleration is involved. The experiments use sources with gravitational acceleration, in free fall and in motion as a pendulum, so that the results can be checked against fundamental physics principles. The experiments can be easily set up from ``off the shelf'' components only. The experiments are suitable for a wide range of students, including undergraduates not majoring in science or engineering.

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