Waves

Question 1

What happens when waves travel through medium

Answer 1

• particles of medium oscillate + transfer energy between each other
• particles stay in place

Question 2

Types of wave

Answer 2

• transverse
• longitudinal

Question 3

Transverse waves

Answer 3

Oscillations perpendicular to direction of energy transfer

Question 4

Longitudinal waves

Answer 4

Oscillations parallel to direction of energy transer

Question 5

Oscillations

Answer 5

When a particle moves up/down or side to side undisturbed back and forth from rest

Question 6

Compressions in longitudinal waves

Answer 6

Regions of high pressure due to particles being close together

Question 7

Rarefactions in longitudinal waves

Answer 7

Regions of low pressure due to particles being spread further apart

Question 8

Mechanical waves

Answer 8

Waves that can only travel through a medium

Question 9

Electromagnetic waves

Answer 9

Waves that can travel through a vacuum or medium

Question 10

Amplitude

Answer 10

Maximum displacement of wave from undisturbed position to peak/trough

Question 11

What does amplitude affect

Answer 11

Wave intensity

Question 12

Unit of amplitude

Answer 12

Metres (m)

Question 13

Wavelength

Answer 13

Distance between same point on 2 adjacent waves

Question 14

Unit of wavelength

Answer 14

Metres (m)

Question 15

Frequency

Answer 15

Number of waves that pass a certain point every second

Question 16

What does frequency affect

Answer 16

• pitch in sound
• colour in light

Question 17

Unit of frequency

Answer 17

Hertz (Hz)

Question 18

What is a hertz

Answer 18

1 wave passing a certain point per second