Question 1

Which of the following best describes the difference between transverse and longitudinal waves?

Accepted Answer

In a transverse wave, the disturbance is perpendicular to the direction of wave travel, while in a longitudinal wave, it is parallel.

Question 2

A lightning bolt produces both light and sound waves. You see the lightning before you hear the thunder because:

Accepted Answer

Light waves travel much faster than sound waves.

Question 3

Which equation correctly relates the speed $$v$$, wavelength $$\lambda$$, and frequency $$f of a $$traveling wave?

Accepted Answer

$$v = \lambda f$$

Question 4

A wave on a string is described by $$y = A \sin(kx - \omega t). $$What does the parameter $$A$$ represent?

Accepted Answer

The amplitude of the wave

Question 5

If a wave pulse traveling on a light string meets a heavy string, what happens to the reflected pulse?

Accepted Answer

The reflection is inverted.

Question 6

Which of the following is a real-world application of periodic motion discussed in the materials?

Accepted Answer

Radio/TV communication

Question 7

For a mass on a spring undergoing simple harmonic motion, which of the following equations describes its position as a function of time?

Accepted Answer

$$x = A \cos(\omega t + \delta)$$

Question 8

Which property of waves is most responsible for the ability of ultrasound imaging to distinguish small features in human tissue?

Accepted Answer

Short wavelength

Question 9

What is the physical meaning of the wave number $$k in $$the wave equation $$y = A \sin(kx - \omega t)$$?

Accepted Answer

It is the spatial frequency, given by $$k = 2\pi / \lambda.$$

Question 10

A slinky can be used to demonstrate which types of waves?

Accepted Answer

Both transverse and longitudinal waves

Question 11

When a wave pulse reflects from a fixed end, what happens to the pulse?

Accepted Answer

It is reflected and inverted.

Question 12

Which of the following statements about the medium in which a wave travels is correct?

Accepted Answer

The medium does not move, only the disturbance travels.

Question 13

Which of the following best describes the behavior of the transmitted wave when an ultrasound wave in air meets human tissue?

Accepted Answer

The transmitted wave is never inverted.

Question 14

Which property of waves is associated with the terms 'crests' and 'troughs'?

Accepted Answer

Transverse waves

Question 15

If the frequency of a wave is doubled while its speed remains constant, what happens to its wavelength?

Accepted Answer

It is halved.

Question 16

Which of the following is true about the reflection of waves in medical imaging?

Accepted Answer

Reflection is a particle-like property.

Question 17

A wave is described by $$y = A \sin(kx - \omega t). If $$you fix $$x$$, what kind of motion does the point at $$x$$ undergo?

Accepted Answer

Periodic motion

Question 18

Which of the following is NOT an application of periodic motion mentioned in the materials?

Accepted Answer

Nuclear fusion in stars

Question 19

Which equation gives the velocity of a wave in terms of angular frequency $$\omega$$ and wave number $$k$$?

Accepted Answer

$$v = \omega / k$$

Question 20

Water waves are unique because:

Accepted Answer

They are both longitudinal and transverse at the same time.

Waves and Sound I: Introductory Physics Study Notes

Study Guide - Practice Questions