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Interference is a property of
A) water waves.
B) all of these
C) sound waves.
D) light waves.
E) none of these

B) all of these

Two waves traveling in opposite directions on a rope meet and undergo complete destructive interference. Which of the following best describes the waves a moment after the waves meet and coincide?
A) The waves reflect and travel backward.
B) The waves continue unchanged.
C) A single wave continues along the rope.
D) The waves no longer exist.

B) The waves continue unchanged.

If you walk towards a mirror at a certain speed, the relative speed between you and your image is
A) half your speed.
B) twice your speed.
C) none of these
D) your speed.

B) twice your speed.

The source of every sound is something that is
A) undergoing simple harmonic motion.
B) moving.
C) vibrating.
D) accelerating.
E) a net emitter of energy.

C) vibrating.

Refraction results from differences in light's
A) none of these
B) all of these
C) frequency.
D) speed.
E) incident angles.

D) speed.

As you face a plane mirror on the east wall of your room, you raise your north hand. Your image raises
A) its left hand.
B) its south hand.
C) both hands.
D) neither hand.
E) its north hand.

E) its north hand.

A mirage is a result of atmospheric
A) aberrations.
B) dispersion.
C) reflection.
D) refraction.
E) scattering.

D) refraction.

The amplitude of a particular wave is 1 meter. The top-to-bottom distance of the disturbance is
A) none of these
B) 2 m.
C) 0.5 m.
D) 1 m.

B) 2 m.

A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. What is the wave's frequency?
A) 1 hertz
B) 0.5 hertz
C) 2 hertz
D) 6 hertz
E) 3 hertz

C) 2 hertz

A common source of wave motion is a
A) region of variable high and low pressure.
B) harmonic object.
C) none of these
D) wave pattern.
E) vibrating object.

E) vibrating object.

A wave travels an average distance of 6 meters in one second. What is the wave's velocity?
A) 1 m/s
B) 6 m/s
C) less than 0.2 m/s
D) 3 m/s
E) more than 6 m/s

B) 6 m/s

A floating object oscillates up and down 2 complete cycles in 1 second as a water wave of wavelength 5 meters passes by. The speed of the wave is
A) 15 m/s.
B) 2 m/s.
C) 10 m/s.
D) 5 m/s.
E) none of these

C) 10 m/s.

The twinkling of the stars is a result of atmospheric
A) refraction.
B) scattering.
C) aberrations.
D) reflection.
E) dispersion.

A) refraction.

To say that one wave is out of phase with another is to say that the waves are
A) of different frequencies.
B) of different wavelengths.
C) all of these
D) of different amplitudes.
E) out of step.

E) out of step.

A pair of plane mirrors are at right angles to each other. A coin placed near the mirrors has at most
A) 3 images.
B) 2 images.
C) 4 images.
D) more than 4 images.

A) 3 images.

Like a transverse wave, a longitudinal wave has
A) amplitude, wavelength, and speed.
B) amplitude, frequency, wavelength, and speed
C) amplitude, frequency, and wavelength.
D) wavelength, speed, and frequency.
E) amplitude, frequency, and speed.

B) amplitude, frequency, wavelength, and speed

When two mechanical waves coincide, the amplitude of the resultant wave is always ____ the amplitudes of each wave alone.
A) greater than
B) the sum of
C) the same as
D) less than

B) the sum of

Wave interference occurs for
A) light waves.
B) sound waves.
C) All of the above choices are correct.
D) None of the above choices are correct.
E) water waves.

C) All of the above choices are correct.

A wiggle in time is a
A) vibration.
B) neither
C) wave.
D) both

A) vibration.

If you know the wavelength of any form of electromagnetic radiation, you can determine its frequency because
A) the speed of light increases as wavelength increases.
B) wavelength and frequency are equal.
C) the speed of light varies for each form.
D) all wavelengths travel at the same speed.

D) all wavelengths travel at the same speed.

An object that completes 20 vibrations in 10 seconds has a frequency of
A) 200 hertz.
B) 0.5 hertz.
C) 2 hertz.
D) 1 hertz.

C) 2 hertz.

The critical angle for a transparent material is the angle at and beyond which all light within the material is
A) refracted.
B) reflected.
C) diffused.
D) dispersed.
E) absorbed.

B) reflected.

Which of these electromagnetic waves has the shortest wavelength?
A) infrared waves
B) ultraviolet waves
C) X-rays
D) light waves
E) radio waves

C) X-rays

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Which of the following types of interference will occur when the pulses in the figure above meet?
A) no interference
B) destructive interference
C) total interference
D) constructive interference

B) destructive interference

Most of the waves in the electromagnetic spectrum are
A) blue light.
B) invisible.
C) green light.
D) red light.

B) invisible.

The source of all electromagnetic waves is
A) changes in atomic energy levels.
B) none of these
C) vibrating atoms.
D) crystalline fluctuations.
E) accelerating electric charges.

A) changes in atomic energy levels.

As a light ray enters or exits a water-air interface at an angle of 15 degrees with the normal, it
A) always bends toward the normal.
B) sometimes bends towards the normal.
C) always bends away from the normal.
D) does not bend.

B) sometimes bends towards the normal.

If a light ray strikes a flat mirror at an angle of 30° from the normal, the ray will be reflected at an angle of
A) 90° from the normal.
B) 60° from the mirror's surface.
C) 30° from the mirror's surface.
D) 60° from the normal.

B) 60° from the mirror's surface.

The shortest plane mirror in which you can see your entire image is
A) dependent on your distance from the mirror.
B) half your height.
C) equal to your height.
D) about 3/4 your height.
E) about 1/3 your height.

B) half your height.

What is the formula to find speed of light?
A) c = l/f
B) c = lf
C) l2/f
D) c = f/l

B) c = lambda * frequency

Sound waves
A) do not require a medium for transmission.
B) are transverse waves.
C) are longitudinal waves.
D) are a part of the electromagnetic spectrum.

B) are transverse waves.

If the frequency of a certain wave is 10 hertz, its period is
A) None of the above choices are correct.
B) 0.1 second.
C) 10 seconds.
D) 100 seconds.

B) 0.1 second.

Light refracts when traveling from air into glass because light
A) has greater intensity in air than in glass.
B) has greater frequency in glass than in air.
C) has greater intensity in glass than in air.
D) travels slower in glass than in air.
E) has greater frequency in air than in glass.

D) travels slower in glass than in air.

Object and image for a plane mirror lie
A) equal distances from the mirror.
B) all of these
C) at right angles to each other.
D) along the same plane.
E) none of these

A) equal distances from the mirror.

A fishing-boat captain returns to port saying, "It's rough out there - the waves are 4 meters high." He probably means that the amplitude of the waves is
A) 4 m.
B) 1 m.
C) 3 m.
D) 2 m.

D) 2 m.

When light reflects from a surface, there is a change in its
A) speed.
B) none of these
C) frequency.
D) wavelength.
E) all of these

B) none of these

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Each compression in the waveform of the longitudinal wave shown above corresponds to what feature of the transverse wave below it?
A) crests
B) troughs
C) wavelength
D) amplitude

A) crests

A wave travels an average distance of 1 meter in 1 second with a frequency of 1 hertz. Its amplitude is
A) 1 meter.
B) more than 1 meter.
C) not enough information to say
D) less than 1 meter.

C) not enough information to say

When light passes through an ordinary window pane, its angle of emergence is
A) usually less than its angle of incidence.
B) the same as its angle of incidence.
C) always more than its angle of incidence.
D) usually more than its angle of incidence.
E) always less than its angle of incidence.

B) the same as its angle of incidence.

Part of a pencil that is placed in a glass of water appears bent in relation to the part of the pencil that extends out of the water. What is this phenomenon called?
A) reflection
B) refraction
C) diffraction
D) interference

B) refraction

Different colors are dispersed by a prism because different colors in the prism have different
A) speeds.
B) none of these
C) directions.
D) frequencies.
E) energies.

A) speeds.

When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray strikes the mirror's surface, the angles of incidence and reflection are measured from the normal and
A) the angle of incidence is less than the angle of reflection.
B) the angles of incidence and reflection are equal.
C) the angle of incidence can be greater than or less than the angle of reflection.
D) the angle of incidence is greater than the angle of reflection.

B) the angles of incidence and reflection are equal.

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Which of the following types of interference will occur when the pulses in the figure above meet?
A) constructive interference
B) no interference
C) total interference
D) destructive interference

A) constructive interference

Electromagnetic waves consist of
A) high-frequency gravitational waves.
B) particles of light energy.
C) oscillating electric and magnetic fields.
D) compressions and rarefactions of electromagnetic pulses.

C) oscillating electric and magnetic fields.

The law of reflection holds for
A) neither of these
B) both of these
C) plane mirrors.
D) curved mirrors.

B) both of these

A wave oscillates up and down two complete cycles each second. If the wave travels an average distance of 6 meters in one second, its wavelength is
A) 3 m.
B) 6 m.
C) 2 m.
D) 0.5 m.
E) 1 m.

A) 3 m.

.
Iridescent colors seen in the pearly luster of an abalone shell are due to
A) polarization.
B) dispersion.
C) interference.
D) refraction.
E) diffraction.

C) interference.

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Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 100 megahertz is
A) none of these
B) 3.0 m.
C) 30 m.
D) 300 m.
E) 0.3 m.

B) 3.0 m.

Wave interference occurs for
A) All of the above choices are correct.
B) None of the above choices are correct.
C) sound waves.
D) light waves.
E) water waves.

A) All of the above choices are correct.

The critical angle is least in which of the following?
A) vacuum
B) diamond
C) glass
D) water

B) diamond

The main difference between a radio wave and a light wave is its
A) speed.
B) wavelength.
C) frequency.
D) two of these
E) all of these

D) two of these

Which of the following is not a transverse wave?
A) radio
B) none of these
C) all of these
D) sound
E) light

D) sound

A wave travels through a medium. As the wave passes, the particles of the medium vibrate in a direction perpendicular to the direction of the wave's motion. The wave is
A) longitudinal.
B) a pulse.
C) transverse.
D) electromagnetic.

C) transverse.

When light passes at an angle to the normal from one material into another material in which its speed is higher,
A) it always lies along the normal to the surface.
B) it is unaffected.
C) it is bent away from the normal to the surface.
D) it is bent toward the normal to the surface.

D) it is bent toward the normal to the surface.

Interference colors for light are analogous to
A) resonance for sound.
B) the sonic boom for sound.
C) partial tones for sound.
D) beats for sound.
E) Fourier analysis for sound.

D) beats for sound.

Some of a wave's energy dissipates as heat. In time, this will reduce the wave's
A) frequency.
B) period.
C) amplitude.
D) speed.
E) wavelength.

C) amplitude.

A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by. The wave's wavelength is 10 meters. What is the wave's speed?
A) 40 m/s
B) 2 m/s
C) 20 m/s
D) 10 m/s
E) more than 40 m/s

C) 20 m/s

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