The average human eye has three types of cone cells, each of which is sensitive to a different wavelength range of visible light. The difference in the relative signal from the three cones allows us to distinguish colors. Unfortunately, since these sensitivity ranges overlap, there are some combinations of signals from the cones that can't be created by light emitted from a real object. These are the so-called "
imaginary colors". However, by
selectively overstimulating one or more types of cone, we can still perceive these colors; this is the principle behind the
Eclipse of Titan, an optical illusion which produces both a green and a cyan that don't otherwise appear in nature. (Similar effects can be seen in the Eclipses of
Mars,
Neptune, and
Triton.)
[more inside]
posted by Upton O'Good
on May 10, 2010 -
64 comments
Your daily dose of perception-bending. Stare at the center of this video (wmv or flash) for a minute or two then look away from the screen at your surroundings. You'll experience an interesting and somewhat disconcerting effect. Not appropriate for anyone prone to headaches or seizures.
posted by brain_drain
on Aug 28, 2006 -
51 comments
Masters of Deception "
There are a number of
incredible artistic works featured in Masters of Deception, which require movement to appreciate their full impact. Additionally, I had in my possession various interviews with some of the book's featured artists that I wanted to share with my readership. Unfortunately, the publisher was unwilling to produce a CD to accompany
the book. I have created this web site, therefore, to augment and enhance the reader's experience by presenting those works and interviews that I could not present in book form."
Al Seckel. enjoy.
posted by hortense
on Aug 19, 2005 -
3 comments
