2926: Doppler Effect

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Doppler Effect

Title text: The Doppler effect is a mysterious wavelength-shifting phenomenon which seems to primarily affect sirens, which is why the 🚨 emoji is red.

Explanation

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She got distracted by how cool sirens are. :)

Transcript

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[Miss Lenhart is pointing with a stick to a whiteboard]

Miss Lenhart: The more distant a galaxy is, the redder its light.

Miss Lenhart: Why? Well, that's an interesting question.

[Zoom in on Miss Lenhart]

Miss Lenhart: Ever notice how, when a siren is approaching, it sounds like Bweeeeeeeeee...

[Zoom in on Miss Lenhart with her arms raised]

Miss Lenhart: ...but then it zooms past and goes Nyeeeooooowww?

Miss Lenhart: And sometimes they hit a button that makes it go Pyeew! Pyeew! really loud?

[Miss Lenhart with his finger raised standing in front of the whiteboard]

Miss Lenhart: And in Europe they go Oooo^eeeeoooo^eeee...

Off-panel voice: So why are galaxies red?

Miss Lenhart: Oh, no idea.

Miss Lenhart: Anyway, another siren I like is...

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