Reflection and Mirrors
Practice Test
1.
The speed of a wave depends on the __________.
a.
energy
b.
medium
c.
amplitude
d.
frequency
Hint
2.
In Figure 16-6, if the candle were moved so that it was 2
d
to the right of the screen, but the lamp was not moved, how would the luminous intensity of the lamp have to be adjusted to make each side of the screen equally illuminated?
a.
It would need to be halved.
b.
It would need to be quadrupled.
c.
It would need to be doubled.
d.
It would need to be quartered.
Hint
3.
The force exerted by a fluid on an object moving through the fluid is called the __________.
a.
apparent weight
b.
drag force
c.
terminal velocity
d.
net force
Hint
4.
To make red light white, add __________.
a.
magenta light
b.
yellow light
c.
green light
d.
cyan light
Hint
5.
__________ is the point of the largest displacement where two waves meet.
a.
An antinode
b.
A period
c.
A crest
d.
A node
Hint
6.
On Earth, a scale shows that you weigh 490 N. What is your mass?
a.
22 kg
b.
75 kg
c.
50 kg to 5.0×10
1
kg
d.
100 kg
Hint
7.
In Figure 14-2, if the scale of the graph is 1 block = 10 N on the vertical axis and one block = 2 cm on the horizontal axis, what is the spring constant?
a.
20 N/m
b.
250 N/m
c.
5 N/m
d.
500 N/m
Hint
8.
Danish astronomer Ole Roemer first measured the speed of light by studying __________.
a.
how light traveled around two mountains
b.
the orbit of Io, a moon of Jupiter
c.
how lasers travel in space
d.
the Moon
Hint
9.
If in Figure 17-4 the image of the lamp is 5 ft behind the mirror and the girl is 1 ft in front of the mirror, where is the lamp?
a.
5 ft behind the girl
b.
10 ft behind the girl
c.
6 ft behind the girl
d.
4 ft behind the girl
Hint
10.
Real images produced by mirrors have __________ magnification.
a.
negative
b.
massive
c.
opposite
d.
positive
Hint
11.
Your image in a bathroom mirror results from __________.
a.
specular reflection
b.
diffuse reflection
c.
diffuse refraction
d.
specular refraction
Hint
12.
The point at which a line crosses the
y
-axis is the __________.
a.
parallax
b.
slope
c.
rise
d.
y
-intercept
Hint
13.
What value is calculated by dividing rise by run?
a.
angular velocity
b.
the slope of a straight line
c.
acceleration of a moving object exhibiting uniform motion
d.
length of a straight line
Hint
14.
A(n) __________ is a line perpendicular to a reflective surface.
a.
incidence
b.
reflection
c.
angle
d.
normal
Hint
15.
A projectile's path through space is called its __________.
a.
period
b.
flight plan
c.
trajectory
d.
range
Hint
16.
In Figure 14-4, if you doubled the mass of the pendulum, what effect, if any, would it have on its period?
a.
The new period would be half the old period.
b.
The new period would be the old period, times the square root of two.
c.
The new period would be the old period, divided by the square root of two.
d.
It would have no effect.
Hint
17.
The __________ is the height of the projectile when the vertical velocity is zero.
a.
range
b.
trajectory
c.
maximum height
d.
torque
Hint
18.
In Figure 14-14, how do the frequencies of the waves in pictures a and c compare?
a.
a's frequency is one-quarter of c's.
b.
a's frequency is half of c's.
c.
a's frequency is four times c's.
d.
a's frequency is twice c's.
Hint
19.
__________ is located behind a convex mirror.
a.
A ray
b.
The object
c.
A real image
d.
The focal point
Hint
20.
A primary light color is a __________.
a.
secondary light color
b.
secondary pigment color
c.
primary pigment color
d.
tertiary pigment color
Hint
