Physics
Physics, 28.07.2019 23:00, thomasalmo2014

In the early 19th century christian doppler, an austrian physicist, proposed a theory regarding the properties of a moving source of sound. this is now known as doppler’s law or the doppler effect. what does this law state? a) the loudness of a moving source of sound is independent of the observer. b) the frequency of a moving source of sound is independent of the observer. c) the loudness of a moving source of sound is greater as it approaches an observer. d) the frequency of a moving source of sound is greater as it approaches an observer.

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