txt.sour.is xkcd-com@feeds.twtxt.net "Doppler Effect The Doppler effect is a mysterious wavelength-shifting phenomenon which seems to primarily affect sirens, which is why the 🚨 e ..."

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Mon, Apr 29 00:00 2024 (1y ago)

Doppler Effect
The Doppler effect is a mysterious wavelength-shifting phenomenon which seems to primarily affect sirens, which is why the 🚨 emoji is red. ⌘ Read more

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