Chapter 2:
Light and Vision
Practice Test
1.
What is the term used to describe the process of changing the direction light travels when it passes from one material to another?
a.
diffuse reflection
b.
regular reflection
c.
refraction
d.
Light always travels in straight lines.
Hint
2.
What is white light made of?
a.
White light is a mixture of colored pigments.
b.
White light is a mixture of all colors of light.
c.
White light is the light from a prism.
d.
White light is the mixture of the colors cyan, magenta, and blue.
Hint
3.
What did Isaac Newton observe when light entered a prism?
a.
Light emerges from a prism as white light.
b.
Light emerges from a prism as a spectrum.
c.
Different colors of light bend the same way.
d.
The three primary colors of light are red, green, and blue.
Hint
4.
What kinds of light-sensitive receptors does the eye contain?
a.
light-sensitive cones and light-sensitive rods
b.
light-sensitive cones and color-sensitive rods
c.
light-sensitive rods and color-sensitive cones
d.
blue rods and yellow cones
Hint
5.
People who are color-blind lack what?
a.
one or more of the two kinds of color-sensitive rods
b.
one or more of the three kinds of light-sensitive cones
c.
one or more of the four kinds of light-sensitive rods
d.
one or more of the three kinds of color-sensitive cones
Hint
6.
How does light travel after it is reflected by an object?
a.
in a straight line
b.
around corners
c.
The light creates a shadow.
d.
It is absorbed.
Hint
7.
Light reflecting off of a sheet of paper is an example of what kind of reflection?
a.
smooth reflection
b.
regular reflection
c.
diffuse reflection
d.
regular diffraction
Hint
8.
How is it possible to see objects that are not sources of light?
a.
Objects can reflect light.
b.
Objects can refract light.
c.
All objects are sources of light.
d.
Objects are translucent.
Hint
9.
What part of the eye senses light and color?
a.
the pupil
b.
the retina
c.
the iris
d.
the lens
Hint
10.
What ring of tiny muscles regulates the amount of light entering the eye?
a.
the pupil
b.
the retina
c.
the iris
d.
the lens
Hint
