Properties of Waves9

Question 1

What are waves?

Answer 1

Waves are a way of transferring energy. Waves are caused by vibrations.

Question 2

What are transverse waves?

Answer 2

• vibration are perpendicular to the direction of the movement of the wave
• the wave has crests and troughs

Question 3

What is an example of a transverse wave?

Answer 3

Everything except sound, ultrasound, primary earthquake tremor

Question 4

What is a longitudinal wave?

Answer 4

• the vibration are parallel to the direction of movement of the wave
• the wave has compressions and rarefactions

Question 5

What is an example of a longitudinal wave?

Answer 5

sound, ultrasound, primary earthquake tremor

Question 6

What is a mechanical wave?

Answer 6

A wave which needs a medium to travel through

Question 7

What is an example of a mechanical wave?

Answer 7

Transverse mechanical waves-water, waves on a string, secondary earthquake tremors
Longitudinal mechanical waves-sound, ultrasound primary earthquake tremors

Question 8

What is an electromagnetic wave?

Answer 8

Electromagnetic waves don’t need a medium to travel through. They can travel through a vacuum. All electromagnetic waves are transverse.

Question 9

What is an example of an electromagnetic wave?

Answer 9

Radio waves, Gamma rays, Light, Ultra violet, Microwaves, X-Rays, Infra-red

Question 10

What is Amplitude and what is it measured in and what is a symbol which represents it?

Answer 10

• Amplitude is the distance between the highest crest or trough to the rest position.
• measured in metres
• symbol=A

Question 11

What is Wavelength and what is it measured in and what is a symbol which represents it?

Answer 11

• the length of a complete wave, one crest and trough or one compression and one rare-faction
• measured in metres
• symbol=λ

Question 12

What is Frequency and what is it measured in and what is a symbol which represents it?

Answer 12

• the frequency is the amount of waves being produced in a second
• measure in hertz(Hz)
• symbol=f

Question 13

What is Period and what is it measured in?

Answer 13

• the period is the amount of time it takes to complete 1 crest and trough
• measure in seconds

Question 14

What is an equation to show the relationship between period and frequency?

Answer 14

1
Period= ————
Frequency

Question 15

What is Wave Speed measured in and what is a symbol which represents it?

Answer 15

• measured in metres per second(m/s)

- symbol=v

Question 16

What is an equation to show the relationship between wave speed, wave length and frequency?

Answer 16

Wave speed = frequency x wave length