4.1.4 - Waves

Question 1

Define: Compression

Answer 1

Areas in a Longitudinal Wave where the particles are closer together

Question 2

Define: Longitudinal Wave

Answer 2

Wave with oscillations parallel to the direction of energy transfer

Question 3

Define: Oscillations

Answer 3

Vibration

Question 4

Define: Rarefaction

Answer 4

Areas in a Longitudinal Waves where the particles are further apart

Question 5

Define: Stationary Waves

Answer 5

Occur when waves of the same frequency, but travelling in opposite directions, meet.

Question 6

Define: Transverse Wave

Answer 6

Wave with oscillations perpendicular to the direction of energy transfer

Question 7

Define: Vibrations

Answer 7

Repeated movements back and forth

Question 8

Define: Waves

Answer 8

Vibrations that transfer energy without the transfer of matter

Question 9

What does a wave transfer?

Answer 9

Energy

Question 10

Give an example of a transverse wave.

Answer 10

Ripples on water

Question 11

Give an example of a longitudinal wave.

Answer 11

Sound wave

Question 12

How I (personally) remember transverse waves.

Answer 12

Up and down like a heartbeat monitor

Question 13

How I (personally) remember longitudinal wave.

Answer 13

Like a spring

Question 14

In which type of wave are there compressions and rarefactions?

Answer 14

Longitudinal waves

Question 15

How do we know water waves don’t carry water away from the source?

Answer 15

If a twig is dropped and it doesn’t move

Question 16

Define: Amplitude

Answer 16

A waves maximum displacement

Question 17

Define: Wavelength

Answer 17

The length of a single wave, measured from one wave peak to the next

Question 18

Define: Crest

Answer 18

Point of maximum displacement from the rest position

Question 19

Define: Trough

Answer 19

Point of minimum displacement from the rest position

Question 20

What is the equation for Wave Speed?

Answer 20

Wave Speed = frequency x wavelength

Question 21

What is the units for Wave Speed?

Answer 21

Metres per second (m/s)

Question 22

What is the units for Frequency?

Answer 22

Hertz (Hz)

Question 23

What is the units for Wavelength?

Answer 23

Metres (m)

Question 24

What is the Period of a Wave?

Answer 24

The amount of time it takes for a full circle of the wave.

Question 25

What is the calculation to find the Period of a Wave?

Answer 25

Period = 1 / Frequency

Question 26

What is the units for Period of a Wave?

Answer 26

Seconds (s)

Question 27

What are the 7 types of EM (Electromagnetic) Waves?

Answer 27

- Radio Waves - Microwaves - Infrared - Visible Light - Ultraviolet - X-rays - Gamma Rays

Question 28

How does the Wavelength, Frequency, Energy and Danger change from left to right in EM Waves?

Answer 28

- Wavelength = decreases - Frequency = increases - Energy = increases - Danger = increases

Question 29

How are EM Waves different to other waves?

Answer 29

They dont need a material to travel

Question 29

What is the speed of EM Waves through a vacuum?

Answer 29

3.0 x 10^8 m/s

Question 30

Which EM Wave has the shorted wavelength?

Answer 30

Gamma Rays

Question 31

Which EM Waves are used for communication?

Answer 31

- Radio waves - Microwaves

Question 32

Give two similarities between all EM Waves.

Answer 32

- Same Speed - Can travel through a Vacuum