Section 17.2
Curved Mirrors
Practice Test
1.
What does the F on a ray diagram represent?
a.
the center of the mirror
b.
the location of the object
c.
the location of the virtual image
d.
the focal point
Hint
2.
When an object is placed between the focal point and a concave mirror, the rays __________.
a.
converge and sight lines converge and form a real image
b.
diverge and sight lines diverge and form a real image
c.
diverge and sight lines converge and form a virtual image
d.
converge and sight lines diverge and form a virtual image
Hint
3.
Real images produced by mirrors have __________ magnification.
a.
negative
b.
positive
c.
massive
d.
opposite
Hint
4.
A 10-cm object has a 20-cm image. What is the magnification?
a.
2
b.
10
c.
1/2
d.
20
Hint
5.
In a ray tracing diagram, two rays must pass through the __________ to determine the location of the image.
a.
object
b.
lens edge
c.
image
d.
focal point
Hint
6.
Spherical aberration can be avoided by using a __________.
a.
spherical mirror
b.
convex mirror
c.
parabolic mirror
d.
plane mirror
Hint
7.
Which type of mirror produces an image that is always erect, always the same height as the object, and always virtual?
a.
diffuse
b.
convex
c.
concave
d.
plane
Hint
8.
__________ is located behind a convex mirror.
a.
The focal point
b.
A ray
c.
A real image
d.
The object
Hint
9.
What is
f
if you have an object 2.0 m from the concave mirror, and the image is 4.0 m from the mirror?
a.
1.3 m
b.
0.67 m
c.
2.0 m
d.
4.0 m
Hint
10.
In Figure 17-14, if the object is 4 times farther from the mirror than the image, what is the focal length of the mirror?
a.
0.75 m
b.
0.80 m
c.
1.33 m
d.
1.25 m
Hint
11.
A __________ image is formed when light rays converge and pass through the image.
a.
virtual
b.
critical
c.
real
d.
convex
Hint
12.
In a concave mirror, an object placed __________ will result in a virtual image.
a.
between the focal point and mirror
b.
twice the distance of the focal point
c.
past the focal point
d.
between the focal point and twice the distance of the focal point
Hint
13.
If you wanted to adjust the situation in Figure 17-13 to produce a real image, which one of the following options by itself would work?
a.
replace the object with a larger object.
b.
replace the mirror with another concave mirror of longer focal length
c.
replace the mirror with a convex mirror of the same focal length
d.
move the object out past the focal point
Hint
14.
In Figure 17-14, if the image is one-third the size of the object and the object is 3.0 m away from the mirror, what is the focal length of the mirror?
a.
-1.5 m
b.
.75 m
c.
0.66 m
d.
3 m
Hint
15.
The image from a convex mirror will _________.
a.
always be real
b.
always be virtual
c.
always be projected
d.
never be virtual
Hint
16.
The distance from the focal point to the mirror is the __________.
a.
focus point
b.
focal length
c.
foci
d.
focal distance
Hint
