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jan 1, 1842 - Christian Johann Doppler

Description:

Proposes Doppler effect - change in frequency & wavelength of a wave perceived by an observer of a moving object (from long wavelength, low freq as it approaches to short wavelength, high freq as it moves away).

Added to timeline:

History of Ultrasound

ByRuqayyah
16 Mar 2024
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0
160

Date:

jan 1, 1842
Now
~ 184 years ago
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