Waves

Question 1

What is a wave?

Answer 1

A type of disturbance that moves energy from one place to another

Question 2

What do waves not transport?

Answer 2

Matter

Question 3

What are waves caused by?

Answer 3

Vibrations / Oscillations

Question 4

What is the difference between water and light waves?

Answer 4

Water waves oscillate up and down while light waves oscillate through space

Question 5

What is the substance through which a wave moves through called?

Answer 5

The medium

Question 6

What are the two ways that waves can oscillate?

Answer 6

Longitudinal and Transverse

Question 7

What direction do Longitudinal waves travel?

Answer 7

Parallel to the direction of energy transfer

Question 8

What direction do Transverse waves travel?

Answer 8

Perpendicular to direction of energy transfer

Question 9

What are 3 examples of Longitudinal waves?

Answer 9

Sound, Ultrasound and Slinky (back and forth)

Question 10

What are 10 examples of Transverse waves?

Answer 10

Light, Microwaves, Infra-red, Ultra-violet, Gamma rays, Radio waves, X-rays, Water waves, Rope, Slinky

Question 11

What is the top of the wave called?

Answer 11

Peak/Crest

Question 12

What is the bottom of the wave called?

Answer 12

Trough

Question 13

What is the rest position of a wave?

Answer 13

Half way point between the peak and the trough about which the wave oscillates

Question 14

What is the altitude of a wave?

Answer 14

The distance between the rest position and the peak/trough of the wave

Question 15

What is the wavelength of a wave?

Answer 15

The distance from one point on a wave to the next point (eg. trough to trough)

Question 16

What is the frequency of a wave?

Answer 16

Number of waves passing a point per unit time (eg. seconds)

Question 17

What is frequency measured in?

Answer 17

Hertz

Question 18

What does 1 Hz mean?

Answer 18

1 wave per second passes a point

Question 19

What speed do sound waves travel at?

Answer 19

330 m/s

Question 20

What speed do wave son water travel at?

Answer 20

10 m/s

Question 21

What speed do light waves in a vacuum travel at?

Answer 21

3 x 10 to the power of 8 m/s

Question 22

What is the relationship between speed, wavelength and frequency?

Answer 22

Speed = frequency x wavelength

v = f x upside-down y

Question 23

When does the Doppler Effect occur?

Answer 23

Relative motion

Question 24

If a person is further away from the source of the waves what is the frequency?

Answer 24

Lower

Question 25

If a person is closer to the source of the waves what is the frequency?

Answer 25

Higher

Question 26

What happens when waves move from one medium to another?

Answer 26

They change speed

Question 27

What happens if a wave does not hit along the normal

Answer 27

It changes direction, bends towards the normal if slowing down and away if speeding up

Question 28

What is a wavefront?

Answer 28

The line of disturbance of the wave

Question 29

What happens when water waves move from deep to shallow water?

Answer 29

Slows down

Question 30

What happens to the wavelength of a wave if it’s speed decreases but the frequency stays the same?

Answer 30

Wavelength decreases and the wavefronts come closer together

Question 31

What is the relationship between Frequency and time period?

Answer 31

Frequency = 1 / time period

f = 1/T