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GenoDRPh
GenoDRPh
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July 25th, 2026 at 2:13:46 PM permalink
Quote: aceside

Quote: ThatDonGuy

Okay, time for an actually easy physics puzzle - probably a little too easy

The following conversation took place between two people travelling in space:

"Did that object suddenly turn blue?"
"Yes - that's an example of 'blueshift.' As you approach an object, its color shifts towards the blue end of the spectrum."
"Except...we're moving away from it."
Explain what is actually happening.

That definition of blueshift is not entirely accurate

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The object was purple to begin with.

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Purple doesn't exist as single wavelength. The object was therefore violet or perhaps ultraviolet to begin with.
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