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Multiple Choice Quiz
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1
In a transverse wave
A)particles move back and forth, forming a series of compressions and rarefactions.
B)particles do not move, they only vibrate.
C)particles move perpendicular to the direction of the wave.
D)the solid portion of the medium moves perpendicular to the liquid portion.
2
In a longitudinal wave
A)particles move back and forth, forming a series of compressions and rarefactions.
B)particles do not move, they only vibrate.
C)particles move perpendicular to the direction of the wave.
D)the solid portion of the medium moves perpendicular to the liquid portion.
3
Transverse mechanical waves
A)can only occur in solids.
B)can only occur in liquids.
C)can occur in both solids and liquids.
D)are always found in conjunction with longitudinal waves.
4
Which of the following equations is incorrect?
A)ν = ƒ λ
B)ν = ƒ/λ
C)T = 1/ƒ
D)ƒ = ν/λ
5
A hertz (hz) is
A)a unit of frequency defined as one cycle per second.
B)is a unit of energy carried by a wave.
C)a wavelength of one per unit of amplitude.
D)the basic measurement applied to electromagnetic waves compared to mechanical waves.
6
Standing waves
A)occur when the amplitudes of two waves meet and cancel out.
B)are utilized by many musical instruments.
C)can only occur in liquid mediums.
D)are found only in longitudinal waves.
7
The speed of wound waves
A)is faster through the air than liquids.
B)is faster in solids than liquids.
C)determines the type of sound, such as infrasound (very fast) or ultrasound (very slow).
D)is purposefully modulated in the technique of sonar detection.
8
Which one of the following waves can travel through a vacuum?
A)sound waves
B)radio waves
C)mechanical waves
D)electromechanical waves
9
A 70-dB (decibel) sound is how many times stronger than a 40-dB sound?
A)30 times
B)100 times
C)1,000 times
D)one cannot determine this without knowing the amplitude of the waves
10
An automobile sounding its horn is moving toward an observer. The frequency of the horn's sound relative to its normal frequency is
A)higher.
B)lower.
C)the same.
D)higher or lower depending upon the amplitude of the waves.
11
The doppler effect refers to changes in wave
A)amplitude.
B)speed.
C)frequency.
D)all of the above.
12
In a musical stringed instrument, the tone produced by the vibrating string is the ____________ and shorter standing waves producing higher frequencies are ___________.
A)overtone, fundamental
B)refraction, diffraction
C)interference, resonance
D)fundamental, overtone
13
Frequencies in ordinary human speech are mostly
A)under 200 Hz.
B)between about 0 and 1000 Hz.
C)above 1000 Hz.
D)varied widely among individuals that it is impossible to generalize.
14
Prior to Maxwell it was known that a changing magnetic field
A)produces an electric current.
B)will annihilate electrons.
C)has no effect on electrons.
D)will propogate longitudinal waves in any solid medium.
15
According to Maxwell's equations, the speed of electromagnetic waves in empty space
A)should be proportional to the surrounding gravitational field.
B)is equal to the speed of light.
C)is dependent on the frequency of the waves.
D)is rarely constant.
16
The energy of an electromagnetic wave
A)is proportional to its frequency.
B)is proportional to its wavelength.
C)is proportional to its speed.
D)is constantly exchanged between its fluctuating electric and magnetic fields.
17
A radio signal
A)can carry information in the variations of the strength of the waves, known as amplitude modulation.
B)can carry information in the variations of the strength of the waves known as frequency modulation.
C)can carry information in the variations of the strength of the frequency known as amplitude modulation.
D)can carry information in the variations of the frequency of the waves known as amplitude frequency modulation.
18
Light of which color has the highest frequency?
A)red
B)orange
C)yellow
D)violet
19
Relative to the Index of Refraction
A)a value of 1 represents the highest amount of light deflection as it enters the medium.
B)3 is a typical value for water.
C)a higher value correlates with greater deflection of light rays entering the medium from air at an oblique angle.
D)it is defined as the ration of the speed of light in the medium to the speed of light in a vacuum.
20
A converging lens
A)is thin in the middle and thick along the rim.
B)spreads out a parallel beam of light.
C)focuses a parallel beam of light at the point behind the lens known as the focal point.
D)is said to have a virtual focal point.
21
In a human eye
A)the lens focuses light on the cornea.
B)the cornea is the portion of the eye that gives a person his or her eye color.
C)light hitting the retina is converted to nerve impulses carried by the optic nerve to the brain.
D)the colored iris is the opening of the pupil and is directly connected to the rods and cones of the ciliary muscles.
22
Waves in a lake are observed to be 3 m in length and to pass an anchored boat 2 seconds apart. The speed of the waves is
A)5 m/s.
B)6 m/s.
C)12 m/s.
D)impossible to find from the information given.
23
A boat at anchor is rocked by waves whose crests are 5 m apart and whose speed is 5 m/s. These waves reach the boat with a frequency of
A)1 Hz.
B)4 Hz.
C)20 Hz.
D)100 Hz.
24
The colors of the rainbow, or of white light passed through a prism, from longest to shortest wavelength are
A)orange, green, blue, red, violet.
B)violet, red, blue, orange, yellow.
C)red, orange, yellow, green, blue, violet.
D)the colors vary depending on the temperature.
25
A telescope with a larger diameter lens
A)will suffer from increased light diffraction, but this is more than offset by the increased amount of light entering the lens.
B)will produce sharper images than a comparable telescope with a smaller diameter lens.
C)is most useful at relatively low magnifications due to its focal length.
D)may give slightly blurred images because it is so difficult to precisely grind a large lens.







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