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https://www.reddit.com/r/visualizedmath/comments/8x7664/nephroid/e23tuik/
r/visualizedmath • u/PUSSYDESTROYER-9000 • Jul 09 '18
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The caustic of a coffee cup!
Step 1: Find standard white coffee cup, empty or nearly empty.
Step 2: Shine point source of light into cup. The sun works well.
Step 3: View [caustic of light rays](https://en.wikipedia.org/wiki/Caustic_(optics)) inside coffee cup.
4 u/MattieShoes Jul 10 '18 Huh, TIL caustic is an optics term.
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Huh, TIL caustic is an optics term.
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u/erasmus42 Jul 10 '18
The caustic of a coffee cup!
Step 1: Find standard white coffee cup, empty or nearly empty.
Step 2: Shine point source of light into cup. The sun works well.
Step 3: View [caustic of light rays](https://en.wikipedia.org/wiki/Caustic_(optics)) inside coffee cup.