Ë color is a psycho - physical response

Ë the human eye sees from 380 - 770 nm (NOT 400 - 700nm)

ex./ 380__________550__________770

blue green red

1. psycho - physical theory: invented by Young Helmhotlz, the eye sees three colors of light - red, green, and blue - that are reflected from objects.

2. trichromatic: sees all three colors

2. dichromatic: sees only two of the three colors

2. monochromatic: sees only black and white

2. opponent vision theory: invented by Herning, perceptors in the eye sees three sets of colors -

2. yellow - blue }psychological color sets

* color after image = when an image that is one of these colors is looked at, when looked away the opposing color is seen

Ë pseudoisochromatic color test = colored images surrounded by grey pebbles

H even people with good color sight can have bad color sight in certain conditions

* photopic vision = daylight, good illuminance, eye peaks at 550nm

* scotopic vision = low illuminance,

* 5 main hues: Red, Yellow, Green, Blue, Purple

H even people with good color sight can have bad color sight in certain conditions

* spectral reflectance = of the amount of each color of light reflected

additive secondary colors = cyan, magenta, yellow = subtractive primary colors

* spectral reflectance = of the amount of each color of light reflected

3. saturation = value + chroma, changes diagonally

Some common words found in the essay are:
BP PR, , Blue Purple, colors =, red green, green blue, illuminance eye peaks, red green blue, eye peaks, = red, black white, = subtractive, chroma changes, secondary colors, colors 2, V/C Bibliography, Yellow Green, RY YG, Green Blue, YG GB, magenta = green, red magenta =, = green yellow, Red Yellow, GB BP,
Approximate Word count = 894
Approximate Pages = 4 (250 words per page double spaced)