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dec 28, 1841 - Doppler effect published

Description:

First described by Christian Doppler - https://www.britannica.com/science/Doppler-effect
http://www.qrg.northwestern.edu/projects/vss/docs/communications/3-what-is-the-doppler-effect.html

Added to timeline:

Date:

dec 28, 1841
Now
~ 182 years ago