1. This student is looking at many colors on his computer screen
This student is looking at many colors on his computer screen. What he is actually seeing, however, are combinations of only three colors of light.

2. Key Concepts
How does a prism separate white light?
What determines the color of an object?
What are the primary colors of light?
What are the primary colors of pigments?

3. After passing the prism, which color of visible light bends the most?
Key Concepts
As white light passes through a prism, shorter wavelengths refract __________ than longer wavelengths, and the colors separate.
more
After passing the prism, which color of visible light bends the most?
violet

4. And which color bends the least?
Key Concepts
And which color bends the least?
red

5. Separating White Light Into Colors
Sunlight is made up of ______ the colors of the visible spectrum.
The process in which white light separates into colors is called _________________.
A rainbow forms when droplets of __________ in the air act like prisms.
all
dispersion
water

6. Separating White Light Into Colors
When light __________ a raindrop, it slows down and refracts.
Then it reflects off the far inner ______________ of the raindrop.
It refracts again as it __________ the raindrop, speeds up, and travels back toward the source of the light.
enters
surface
leaves

7. The color of any object depends on… what the object is ____________ of
The Colors of Objects
The color of any object depends on…
what the object is ____________ of
on the color of __________ that strikes the
object.
made
light
and how your
own eyes
work!

8. The Colors of Objects
An object’s color is the color of light that reaches your _________ when you look at the object.
Sunlight contains all the colors of the visible spectrum.
A red car in sunlight ____________
mostly ________ light.
Most of the rest of the light is ________________ at the surface of the paint.
eyes
reflects
red
absorbed

9. Only the colors that are ________________ can be reflected.
The Colors of Objects
What happens if you change the color of the light shining on an object?
Only the colors that are ________________ can be reflected.
in the light

10. What are the primary colors of light?
Mixing Colors of Light
What are the primary colors of light?
Primary colors are three specific colors that can be _________________ in varying amounts to create all possible colors.
combined
The primary colors of light are _________, ___________, and ___________.
red
green
blue

11. When any two primary colors combine, a ____________ color is formed.
Mixing Colors of Light
When any two primary colors combine, a ____________ color is formed.
What secondary color do green and red light produce?
When red, green, and blue light combine, what color results?
secondary
yellow
white

12. Each secondary color of light is a combination of two primary colors.
The Colors of Objects
Each secondary color of light is a combination of two primary colors.
The secondary colors of light are ____________, ______________, and _________________.
cyan
yellow
magenta

13. Two colors of light that combine to form white light are
The Colors of Objects
If you add a ________________ color to the proper ________________ color, you will get white light.
Two colors of light that combine
to form white light are
___________________ colors
of light.
primary
secondary
complementary

14. The primary colors of ______________ are cyan, yellow, and magenta.
Mixing Pigments
The primary colors of ______________ are cyan, yellow, and magenta.
pigment
A pigment is a material that ______________ some colors of light and ___________ other colors.
Paints, inks, photographs, and dyes get their colors from pigments.
reflects
absorb

15. Mixing Pigments
When all of the pigments mix together, what color do they produce?
And when magenta and cyan mix?
Cyan and yellow?
Yellow and magenta?
black
blue
green
red

16. A prism separates white light into the visible spectrum because
Assessment Questions
A prism separates white light into the visible spectrum because
longer wavelengths are absorbed more than shorter wavelengths.
shorter wavelengths refract more than longer wavelengths.
shorter wavelengths reflect more than longer wavelengths.
longer wavelengths experience more interference.

17. The color of an object depends on what the object is made of and on
Assessment Questions
The color of an object depends on what the object is made of and on
the intensity of light that strikes the object.
the color of light that strikes the object.
the direction of the light that strikes the object.
the speed of the light that strikes the object.

18. Which of these colors is one of the primary colors of light?
Assessment Questions
Which of these colors is one of the primary colors of light?
green
magenta
yellow
white