[From Chad Green (2012.09.25.1537)]
What is the definition of intensity for the first level of HPCT? Does it account for both magnitude and wavelength (distance between repetitions)? This article brought these questions to mind:
"In a study detailed in the May issue of the journal Animal Behavior, Neitz and his colleagues found that changing the color (or wavelength) of ambient light has a much bigger impact on the day-night cycle of fish than changing the intensity of that light, suggesting that the dominance of blue light at night really is why living things feel more tired at that time (rather than the fact that it's dark), and the dominance of yellow light in the morning is why we wake up then, rather than the fact that it's lighter.
But these evolved responses to color have nothing to do with cone cells, or our perceptions. In 1998, scientists discovered a totally separate set of color-sensitive receptors in the human eye; these receptors, called melanopsin, independently gauge the amount of blue or yellow incoming light, and route this information to parts of the brain involved in emotions and the regulation of the circadian rhythm. Melanopsin probably evolved in life on Earth about a billion years prior to cone cells, and the ancient color-detectors send signals along an independent pathway in the brain."
Source: http://www.lifeslittlemysteries.com/2612-color-red-blue-scientists.html
Thanks,
Chad
Chad Green, PMP
Program Analyst
Loudoun County Public Schools
21000 Education Court
Ashburn, VA 20148
Voice: 571-252-1486
Fax: 571-252-1633
"If you want sense, you'll have to make it yourself." - Norton Juster