Chapter 15

Question 1

If a transverse wave is moving from right to left, the individual particles in the medium are moving _____________

Answer 1

up and down

Question 2

Waves are often caused by _________

Answer 2

Vibrating objects

Question 3

The ______________ of a longitudinal wave radiates outward from its source, while the particles vibrate back and forth about their original positions.

Answer 3

Wave front

Question 4

A wave in which particle motion is perpendicular to wave motion

Answer 4

Transverse wave

Question 5

A term that refers to the high point of a wave

Answer 5

Crest

Question 6

A disturbance at the boundary between two media

Answer 6

Surface wave

Question 7

A wave that requires a medium in which to travel

Answer 7

Mechanical wave

Question 8

A wave in which particle motion is parallel to wave motion

Answer 8

Longitudinal wave

Question 9

A wave that consists of oscillating electromagnetic fields, radiating outward at the speed of light

Answer 9

Electromagnetic wave

Question 10

Our eyes can detect light only within a range of ____________ called visible light.

Answer 10

Frequencies

Question 11

The maximum displacement of a particle by a wave is called

Answer 11

Amplitude

Question 12

The ___________ is the distance between two crests of a wave.

Answer 12

Wavelength

Question 13

The ____________ is the time it takes for one full vibration of a particle in a medium.

Answer 13

Period

Question 14

__________ is the inverse of period.

Answer 14

Frequency

Question 15

Calculate the wave speed for a wave with a wavelength of 2 m and a frequency of 0.3 Hz.

Answer 15

0.6 m/s

Question 16

What is the period of a wave with a wave speed of 50 m/s and a wavelength of 10 mm?

Answer 16

0.2 s

Question 17

The speed of a sound wave _______________.

Answer 17

Does not depend on wavelength, medium or amplitude.

Question 18

Waves travel quickly in a ___________ because the molecules are closely packed and physically bonded together.

Answer 18

Solids

Question 19

The Doppler effect is an observed change in a wave’s ________

Answer 19

Frequency

Question 20

The combination of two or more waves that results in a single wave

Answer 20

Interference

Question 21

The change in direction of a wave when it encounters an obstacle or edge

Answer 21

Diffraction

Question 22

Interference that decreases amplitude

Answer 22

Destructive interference

Question 23

A pattern of vibration that resembles a stationary wave

Answer 23

Standing wave

Question 24

Points in a standing wave that have no vibration due to destructive interference.

Answer 24

Nodes

Question 25

The bouncing back of a wave when it meets a surface or boundary

Answer 25

Reflection

Question 26

Interference that increases amplitude

Answer 26

Constructive interference

Question 27

Sounds produced by the interference of sound waves that are used to tune piano strings

Answer 27

Beats

Question 28

The bending of waves as they pass from one medium to another at an angle

Answer 28

Refraction

Question 29

Method of adding crests and troughs of interfering waves together to describe a new wave

Answer 29

Principle of superposition

Question 30

Sound waves from a radio generally ravel in which medium?

Answer 30

air