Question 1

The region of the electromagnetic spectrum with wavelengths just less than those in the ultraviolet region is the ______________ region.

Accepted Answer

A)  x-rays 
B)  radio waves 
C)  microwaves 
D)  infrared 
E)  gamma rays 
A)  x-rays 
B)  radio waves 
C)  microwaves 
D)  infrared 
E)  gamma rays

Question 2

A radar pulse returns 9.0 × 10-4 s after it was sent out and reflected by an object. What is the separation distance of the radar source and the object?

Accepted Answer

A)  2.7 × 105 m 
B)  1.4 × 105 m 
C)  7.4 × 10-4 m 
D)  3.7 × 10-4 m 
A)  2.7 × 105 m 
B)  1.4 × 105 m 
C)  7.4 × 10-4 m 
D)  3.7 × 10-4 m

Question 3

Which of the following radiations has the greatest frequency?

Accepted Answer

A)  Infrared 
B)  Visible 
C)  Ultraviolet 
D)  X-rays 
A)  Infrared 
B)  Visible 
C)  Ultraviolet 
D)  X-rays

Question 4

A wave in which the particle displacement is perpendicular to the wave motion is called a(n) ______________ wave.

Accepted Answer

The answer of A wave in which the particle displacement...

Question 5

A certain radio wave has a wavelength of 6.0 × 10-2m. What is its frequency in hertz?

Accepted Answer

5.0 * 10<s

Question 6

Which of the following radiations has the longest wavelength?

Accepted Answer

A)  Infrared 
B)  Visible 
C)  Ultraviolet 
D)  X-rays 
A)  Infrared 
B)  Visible 
C)  Ultraviolet 
D)  X-rays

Question 7

The frequency and the wavelength of a wave are ______________ proportional.

Accepted Answer

The answer of The frequency and the wavelength of a...

Question 8

A wave with a frequency of 5 Hz will have a period of ______________ s.

Accepted Answer

The answer of A wave with a frequency of 5...

Question 9

Light can travel to Earth from a distant star, but sound cannot. Why is this?

Accepted Answer

A)  Light is an electromagnetic wave, and sound requires a medium. 
B)  The Sun does not make sound. 
C)  Light is a longitudinal wave, and sound is a transverse wave. 
D)  The statement is false; both light and sound can travel in empty space. 
A)  Light is an electromagnetic wave, and sound requires a medium. 
B)  The Sun does not make sound. 
C)  Light is a longitudinal wave, and sound is a transverse wave. 
D)  The statement is false; both light and sound can travel in empty space.

Question 10

A sound with a frequency of 11 Hz is in the ______________ region of the sound spectrum.

Accepted Answer

A)  infrasonic 
B)  ultrasonic 
C)  audible 
D)  visible 
A)  infrasonic 
B)  ultrasonic 
C)  audible 
D)  visible

Question 11

A sound with a frequency of 15 Hz is in the ______________ region of the sound spectrum.

Accepted Answer

The answer of A sound with a frequency of 15...

Question 12

A Doppler red shift indicates

Accepted Answer

A)  a shift toward lower frequencies. 
B)  a shift toward shorter wavelengths. 
C)  that a light source is approaching relative to the observer. 
D)  none of these. 
A)  a shift toward lower frequencies. 
B)  a shift toward shorter wavelengths. 
C)  that a light source is approaching relative to the observer. 
D)  none of these.

Question 13

A Doppler red shift indicates

Accepted Answer

A)  a shift toward higher frequencies. 
B)  a shift toward shorter wavelengths. 
C)  that a light source is receding relative to the observer. 
D)  none of these. 
A)  a shift toward higher frequencies. 
B)  a shift toward shorter wavelengths. 
C)  that a light source is receding relative to the observer. 
D)  none of these.

Question 14

Wave frequency could be given in

Accepted Answer

A)  1/s. 
B)  s-1 
C)  Hz. 
D)  any of these. 
A)  1/s. 
B)  s-1 
C)  Hz. 
D)  any of these.

Question 15

A stretched string can have ______________ natural frequency(ies).

Accepted Answer

A)  one 
B)  10 times its length in 
C)  5 times its length in 
D)  many 
A)  one 
B)  10 times its length in 
C)  5 times its length in 
D)  many

Question 16

A disturbance in particle motion perpendicular to the wave velocity is called a

Accepted Answer

A)  transverse wave. 
B)  acoustic wave. 
C)  standing wave. 
D)  longitudinal wave. 
A)  transverse wave. 
B)  acoustic wave. 
C)  standing wave. 
D)  longitudinal wave.

Question 17

A disturbance in particle motion parallel to the wave velocity is called a

Accepted Answer

A)  transverse wave. 
B)  acoustic wave. 
C)  standing wave. 
D)  longitudinal wave. 
A)  transverse wave. 
B)  acoustic wave. 
C)  standing wave. 
D)  longitudinal wave.

Question 18

For a wave with a constant speed, the smaller the period, the ______________ its wavelength.

Accepted Answer

The answer of For a wave with a constant speed,...

Question 19

In general, the speed of sound increases as the density of a medium ______________.

Accepted Answer

The answer of In general, the speed of sound increases...

Question 20

Resonance occurs when

Accepted Answer

A)  two different objects vibrate with different frequencies. 
B)  two different objects produce beats. 
C)  an object having a certain natural frequency is set in vibration by a second object vibrating at that frequency. 
D)  an object produces a sound. 
A)  two different objects vibrate with different frequencies. 
B)  two different objects produce beats. 
C)  an object having a certain natural frequency is set in vibration by a second object vibrating at that frequency. 
D)  an object produces a sound.

Exam 6: Waves and Sound

The region of the electromagnetic spectrum with wavelengths just less than those in the ultraviolet region is the ______________ region.

A radar pulse returns 9.0 × 10-4 s after it was sent out and reflected by an object. What is the separation distance of the radar source and the object?

Which of the following radiations has the greatest frequency?

A wave in which the particle displacement is perpendicular to the wave motion is called a(n) ______________ wave.

A certain radio wave has a wavelength of 6.0 × 10-2m. What is its frequency in hertz?

Which of the following radiations has the longest wavelength?

The frequency and the wavelength of a wave are ______________ proportional.

A wave with a frequency of 5 Hz will have a period of ______________ s.

Light can travel to Earth from a distant star, but sound cannot. Why is this?

A sound with a frequency of 11 Hz is in the ______________ region of the sound spectrum.

A sound with a frequency of 15 Hz is in the ______________ region of the sound spectrum.

A Doppler red shift indicates

A Doppler red shift indicates

Wave frequency could be given in

A stretched string can have ______________ natural frequency(ies).

A disturbance in particle motion perpendicular to the wave velocity is called a

A disturbance in particle motion parallel to the wave velocity is called a

For a wave with a constant speed, the smaller the period, the ______________ its wavelength.

In general, the speed of sound increases as the density of a medium ______________.

Resonance occurs when

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A radar pulse returns 9.0 × 10^-4 s after it was sent out and reflected by an object. What is the separation distance of the radar source and the object?

A certain radio wave has a wavelength of 6.0 × 10^-2m. What is its frequency in hertz?