13.7

We can understand this by dividing the solar radiation curve into three regions. Three types of cone-shaped receptors in our eyes perceive color. Each is stimulated only by certain frequencies of light.

Additive primary colors-
A close examination of the picture on a TV screen reveals that the picture is a mixture of tiny spots, each less than a millimeter across.

Untitled Slide

• You can see that white light from the sun is composed of all the visible frequencies when you pass sunlight through a prism.
• The white light is dispersed into a rainbow-colored spectrum.

Red+Blue=Magenta
Red+Green=Yellow
Blue+Green=Cyan

Blue and Yellow lights shining on performers, for example, produce the effect of white light except where one of the two colors is absent,as in the shadows. The shadow of one lamp, say the blue, is illuminated by the yellow lamp and appears yellow.

13.8

The difference between light and pigments

Light is electromagnetic waves and pigments are tiny particles that absorb specific colors

Why are objects the colors that they are?

When a pigment is a color it absorbs the complementary of that color and reflects everything else which is that color.

When you add two light colors together and get whit they are complementary colors an example would be red and cyan

When you take a color away from white you get it's subtractive primary color.

13.9

Not all colors are the result of the addition or subtraction of light. A clear cloudiness day time sky is blue because molecules in the air scatter blue light from the sun more ham they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scatters out and away from the line of sight. The blueness is refracted

THANK YOU ALL FOR WATCHING

• 13.7 made by: Dillan Knopp
• 13.8 made by Joey Harrell
• 13.9 made by Owen Peek, and Darrel Vetor
• Images and design made by Kyler Lilly
• And worksheets by kyler Lilly