# Waves And Their Phenomena

18 Questions | Total Attempts: 233  Settings  Waves are some of the prettiest phenomena in physics, occurring as a result of wind blowing on the surface of an area of water, creating a surface wave on the water. What can you tell us about them?

• 1.
What is the speed of a radio wave in a vacuum?
• A.

0 m/s

• B.

3.31 x 10^2 m/s

• C.

1.13 x 10^3 m/s

• D.

3.00 x 10^2 m/s

• 2.
If the amplitude of a wave in a rope is doubled, the speed of the wave in the rope will
• A.

Decrease

• B.

Increase

• C.

Remain the same

• 3.
A change in the speed of a wave as it enters a new medium produces a change in
• A.

Frequency

• B.

Period

• C.

Wavelength

• D.

Phase

• 4.
A tuning fork oscillates with a frequency of 256 hertz after being struck by a rubber hammer. Which phrase best describes the sound waves produced by this oscillating tuning fork?
• A.

Electromagnetic waves that require no medium for transmission

• B.

Electromagnetic waves that require a medium for transmission

• C.

Mechanical waves that require no medium for transmission

• D.

Mechanical waves that require a medium for transmission

• 5.
In a vacuum, all electromagnetic waves have the same
• A.

Wavelength

• B.

Frequency

• C.

Speed

• D.

Amplitude

• 6.
Waves pass through a 10 centimeter opening in a barrier without being diffracted. This observation provides evidence that the wavelength of the waves is
• A.

Much shorter than 10 cm

• B.

Equal to 10 cm

• C.

Longer than 10 cm, but short than 20 cm

• D.

Longer than 20 cm

• 7.
A radar gun can determine the speed of a moving automobile by measuring the difference in frequency between emitted and reflected radar waves. this process illustrates
• A.

Resonance

• B.

The Doppler effect

• C.

Diffraction

• D.

Refraction

• 8.
As a sound wave passes from water, where the speed is 1.49 x 10^3 m/s, into air, the wave's speed
• A.

Decreases and its frequency remains the same

• B.

Increases and its frequency remains the same

• C.

Remains the same and its frequency decreases

• D.

Remains the same and its frequency increases

• 9.
A wave is diffracted as it passes through an opening in a barrier. the amount of diffraction that the wave undergoes depends on both the
• A.

Amplitude and frequency of the incident wave

• B.

Wavelength and speed of the incident wave

• C.

Wavelength of the incident wave and the size of the opening

• D.

Amplitude of the incident wave and the size of the opening

• 10.
A source of waves and an observer are moving relative to each other. the observer will detect a steadily increasing frequency if
• A.

He moves toward the source at a constant speed

• B.

The source moves away from him at a constant speed

• C.

He accelerates toward the source

• D.

The source accelerates away from him

• 11.
Which pair of terms best describes light waves traveling from the Sun to Earth?
• A.

Electromagnetic and transverse

• B.

Electromagnetic and longitudinal

• C.

Mechanical and transverse

• D.

Mechnical and longitudinal

• 12.
Radio waves diffract around buildings more than light waves do because, compared to light waves, radio waves
• A.

Move faster

• B.

Move slower

• C.

Have a high frequency

• D.

Have a longer wavelength

• 13.
The energy of a sound wave is most closely related to its
• A.

Period

• B.

Amplitude

• C.

Frequency

• D.

Wavelength

• 14.
A girl on a swing may increase the amplitude of the swing's oscillations if she moves her legs at the natural frequency of the swing. This is an example of
• A.

The Doppler effect

• B.

Destructive interference

• C.

Wave transmission

• D.

Resonance

• 15.
An earthquake wave is traveling from west to east through rock. If the particles of the rock are vibrating in a north-south direction, the wave must be classified as
• A.

Transverse

• B.

Longitudinal

• C.

A microwave

• D.

• 16.
Which type of wave requires a material medium through which to travel?
• A.

Electromagnetic

• B.

Infared

• C.

Sound

• D.

• 17.
A microwave and an x ray are traveling in a vacuum. Compared to the wavelength and period of the microwave, the x ray has a wavelength that is
• A.

Longer and a period that is shorter

• B.

Longer and a period that is longer

• C.

Shorter and a period that longer

• D.

Shorter and a period that is shorter

• 18.
Compared to the speed of microwaves in a vacuum, the speed of x rays in a vacuum is
• A.

Less

• B.

Greater

• C.

The same

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