Hi, all --
Although this is not directly teaching-related, it will be the next time I
teach color vision.
I have dried-up wine residue in the bottom of a glass, left from the night
before. It's purple.
I put water in the glass to rinse it, and the water has a purple tint.
I pour this into a white enamel sink. It's *blue*.
The sink is as far as I can see not yellowish -- it really looks white.
Any ideas on why this happens? Anyone care to try to replicate this and report
back?
Thanks,
m
--
Marc Carter, PhD
Associate Professor of Psychology
Chair, Department of Behavioral and Health Sciences
College of Arts & Sciences
Baker University
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