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Atomic Spectra — Cumulative exam Answers

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What type of spectrum is shown below?

Question illustration
A
absorption
B
electromagnetic
C
emission
D
infrared light
42
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The presence of which magnetic feature best explains why a magnet can act at a distance on other magnets or on objects containing certain metals?

A
fields
B
dipoles
C
domains
D
forces
43

Two pulses are moving along a string. One pulse is moving to the right and the second is moving to the left. Both pulses reach point P at the same instant.

Question illustration
A
An illustration with the triangular trough in the middle of the rectangular crest to the left of point P.
Option A
B
An illustration with the triangular trough in the middle of the rectangular crest to the right of point P.
Option B
C
An illustration with a rectangular crest moving toward the right past P and a triangular trough going toward the left past P.
Option C
D
An illustration with a rectangular crest moving toward the left and a triangular trough going toward the right both away from point P and equidistant from P.
Option D
44

What causes the appearance of lines in an emission spectrum?

A
Light is absorbed as an electron moves to a higher energy state.
B
Light is released as an electron moves to a lower energy state.
C
An electron is released as light when it moves to a lower energy state.
D
An electron is released as light when it moves to a higher energy state.
45

The table lists information about four devices.Which lists the devices in order from greatest magnetic field strength to weakest?

Question illustration
A
W, X, Y, Z
B
W, Z, Y, X
C
X, Z, Y, W
D
X, Y, Z, W
46

What is the purpose of a rearview mirror in a car?

A
The mirror allows the light to be absorbed so the driver will not see any glare.
B
The mirror allows the light to interfere so the light waves combine to form an image.
C
The mirror allows the light to be reflected so the objects behind the car can be seen.
D
The mirror allows the light to be transmitted so the light will not reach the driver's eyes.
47

The diagram represents wavelengths of different colors of visible light that pass by in a specific time period.

Question illustration
A
red
B
yellow
C
blue
D
violet
48

Which actions most likely cause the domains within a material to lose their alignment and become more randomized? Check all that apply.

A
heating the material
B
rubbing the material against a magnet
C
passing electricity around the material
D
placing the material in a magnetic field of opposite polarity
E
placing the material near a strong magnet
F
hitting the material
49

A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw based on this description?

A
The electric field points to the left because the force on a negative charge is opposite to the direction of the field.
B
The electric field points to the right because the force on a negative charge is in the same direction as the field.
C
No conclusion can be drawn because the sign of the charge creating the field is unknown.
D
No conclusion can be drawn because the amount of charge on the test charge is unknown.
50

In an experiment, a ringing bell is placed in a vacuum jar that does not have any air in it. What best describes why the bell is seen vibrating but not heard?

A
Light waves have high frequencies and are able to pass through the vacuum jar, but the frequencies of sound waves are too low to vibrate a vacuum.
B
Light waves travel faster than sound waves, so they are able to travel through the vacuum jar, but sound waves do not have enough energy to vibrate glass.
C
Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present.
D
Light is a longitudinal wave that is able to pass through the vacuum jar, but sound is a transverse wave that has to move perpendicular to air.

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