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-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
bounces@carnot.physics.buffalo.edu] On Behalf Of John Denker
Sent: Wednesday, February 09, 2011 12:23 AM
To: Forum for Physics Educators
Subject: [Phys-l] perception of variations in hue
If you want to see something that is (a) pretty and (b) weird,
check out
http://www.av8n.com/imaging/disk-rays-no-rays.htm
It demonstrates that /perceived/ brightness is different from
photometric brightness ... different in a big way. One can
monkey with the hue so as to produce the perception of a
bright ray-like feature, even when there is no such feature
in the actual photometric brightness.
Making a hue-circle with constant perceived brightness is not
an easy task.
If anybody knows of any relevant references, and/or knows the
name of this illusion, please let me know.
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