Paint Takes Away

Nothing Is Colored

Name Date
DIRECTIONS: Red and green paint made mud, not yellow. Mixing light adds; mixing paint takes away. Fill in the table.
LIGHT — addsredgreenyellowboth lamps send.your eye gets both.more lamps → brighterall of them → WHITEPAINT — takes awayredgreenredgreenbluenothinggets outeach one keeps more.it must survive both.more paints → darkerall of them → BLACK
Two lamps

Both send light, and your eye gets it all. Each lamp adds more. All three make white.

Two paints

Paint keeps colors: red paint keeps all but red. Mixed, a color must get past both. Almost nothing does.

Do the same three pairs, twice

mix these twoas lamps shining on a wallas paints stirred together
1. red + green
2. red + blue
3. green + blue

Every row should disagree.

Which Three You Start From

Nothing Is Colored

DIRECTIONS: Light and paint each start from three colors. Fill in what the paints make.
For light: red, green, blue

They add up to white. A screen is only red, green and blue dots.

For paint: cyan, magenta, yellow

Together they take away everything. A printer uses cyan, magenta and yellow ink.

stir these paintswhat comes outwhy
4. cyan + magentacyan keeps red; magenta keeps green
5. cyan + yellowcyan keeps red; yellow keeps blue
6. magenta + yellowmagenta keeps green; yellow keeps blue

The yellow on a screen

yellowwhat you seea drop ofwater on itRGRGRGRGRGRGRGRGRGRGRGRGRGRGRGRGRGRGRGRGwhat is actually therered on,green on,blue offthere is no yellow anywhere in it
There is no yellow on a screen.

Red and green stripes sit side by side, too small to tell apart. Your eye has only three kinds of color detector (red, green, blue), so red plus green fools it into seeing yellow.

Catch it: put a drop of water on a phone screen showing yellow. Look close through the drop. What do you see?