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The
yellow
filter
subtracts the blue
light from the
flashlight beam. The magenta
filter
subtracts the green, leaving only red
light
to reach the wall.
How do the
color layers in a photo mix to form a full range of colors?
The 3 color
layers are 3 photos of the same scene. The amount of color in each
layer matches the amount of each color of the 3 primary colors in the
original scene. The
cyan, magenta and
yellow layers subtract color from the light that you use to view the
photo. Since the layers are transparent, all 3 layers can be seen at
the same time.
Look at
the picture below. Notice that the
white
portion represented by the frost on top of the apple has no color in any
of the layers. What you see as white is really the
paper
backing of the photograph showing through, since no light is being subtracted
in that part of
the picture.
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