Chapter 4.2

Question 1

Wave

Answer 1

A disturbance that travels in a medium transferring energy and momentum from one place to another. The direction of propagation is the direction of energy transfer. There is no large-scale motion of the medium itself

Question 2

Wavelength

Answer 2

The length of a complete oscillation

Question 3

Crest

Answer 3

The highest point on a wave

Question 4

Trough

Answer 4

The lowest point on a wave

Question 5

What does the speed of a wave depend on?

Answer 5

The properties of the medium only, and not on how it is produced

Question 6

Transverse wave

Answer 6

A wave whose displacement is at right angles to the direction of energy transfer

Question 7

What two pieces of information can be obtained from a displacement-distance graph?

Answer 7

The amplitude of the wave and its wavelength

Question 8

What two pieces of information can be obtained from a displacement-time graph?

Answer 8

The amplitude of the wave and its period

Question 9

Longitudinal wave

Answer 9

A wave whose displacement is parallel to the direction of energy transfer

Question 10

Compression

Answer 10

A region of higher than normal density

Question 11

Rarefaction

Answer 11

A region of lower than normal density

Question 12

Electromagnetic wave

Answer 12

A wave that has an oscillating electric and magnetic field at right angles to each other