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Color Addition and Subtraction
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Objective: To use the rules of color addition and subtraction to
predict the color appearance of objects, to predict the light color an
object absorbs, and to describe situations using color equations.
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Pick from among the three activities  In the Spotlight,
Taking Away, and Do the Math.
In the Spotlight
To predict the result of adding two primary colors of light.
3 Situations
Taking Away
Completed
Student Name:
Taking Away
To determine what color(s) is/are absorbed if given the incident light
colors and the color appearance.
6 Situations
Begin
In the Spotlight
Completed
Do the Math
Completed
Do the Math
Identify the color equation for a situation involving color addition
and subtraction.
6 Situations
Color Addition and Subtraction
You have done it!
You have successfully analyzed each of the situations
in the In the Spotlight activity.
You have done it!
You have successfully analyzed each of the situations
in the Do the Math activity.
Continue
You have done it!
You have successfully analyzed each of the situations
in the Taking Away activity.
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Check Answer
Selected Color:
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Tap on the overlap area to toggle through answer options.
Activity:
0,0,0,0
Red
There’s no GREEN light present.
Blue
Tap to select or deselect one or more answer options below.
When satisfied with your choice(s), tap the Check Answer button.
There’s no BLUE light present.
There’s no RED light present.
Green
Absorbed
B
Reflected
Tap on the buttons to create the corresponding Color Equation.
The equations are expressed in terms of primary light colors 
Red (R), Green (G), and Blue (B). Use 0 for no light.
Color equations are symbolic ways of representing the interaction
between incident light and the object it shines on. A color equation
has the form ...

0,0,0
=
Situation:

Incident