Waves

Question 1

What direction do particles move in a transverse wave?

Answer 1

Perpendicular to the direction of travel

Question 2

What direction do particles move in a longitudinal wave?

Answer 2

Parallel to the direction of energy transfer

Question 3

What is the wavelength of a wave and what is it measured in?

Answer 3

The wavelength of a wave is the distance travelled by a wave in one oscillation and it is measured in metres

Question 4

What is the amplitude and what is it measured in?

Answer 4

The amplitude is the maximum distance travelled by a particles in a mean position. It is measured in metres.

Question 5

What is the frequency and what is it measured in?

Answer 5

The frequency is the number of oscillations the wave does in one second. It is measured in Hertz.

Question 6

What is the time period and what is it measured in?

Answer 6

The time period is the time it takes to complete one complete oscillation and it is measured in seconds.

Question 7

What is the wave equation?

Answer 7

V = fa.
V = Wave speed
F = Frequency
A = Wavelength

Question 8

What is the frequency formula (using time period)?

Answer 8

F = 1/T
T being time period

Question 9

What are the two types of waves?

Answer 9

Transverse and longitudinal waves

Question 10

What do waves transfer from one place to another?

Answer 10

Energy

Question 11

What do waves NOT transfer?

Answer 11

Matter

Question 12

What is the very top of a wave called?

Answer 12

Crest

Question 13

What is the very bottom of a wave called?

Answer 13

Trough

Question 14

What is an example of a transverse wave?

Answer 14

Water ripples, transverse waves

Question 15

What is an example of a longitudinal wave?

Answer 15

Sound waves

Question 16

What do all longitudinal waves need to travel?

Answer 16

They all need a medium

Question 17

What is the normal represented as in ray diagrams?

Answer 17

A dashed line perpendicular to the surface of reflection/refraction

Question 18

What is refraction?

Answer 18

Refraction is when a wave enters a new medium, it will bend as it changes speed.

Question 19

What is the law of reflection?

Answer 19

The angle of reflection is equal to the angle of incidence

Question 20

What is the angle of incidence?

Answer 20

The angle at which the wave hits the reflective/refractive surface.

Question 21

What is TAGAGA

Answer 21

Towards normal, air to glass, away from normal, glass to air.
This means that if a wave is going from a rarer medium to a denser medium if will bend towards the normal, however if the wave is going from a denser medium to a rarer medium, it will bend away from the normal.

Question 22

What is white?

Answer 22

Combination of all wavelengths of light

Question 23

What is black?

Answer 23

Absence of light

Question 24

In relation to sound, is a high amplitude a loud sound or a quiet sound?

Answer 24

A high amplitude is a loud sound

Question 25

In relation to sound, what does frequency define?

Answer 25

The pitch of the sound.

Question 26

What medium does sound travel faster in, air or steel?

Answer 26

It travels faster in steel as the perticles are packed together more closely.

Question 27

Which colour has the longest wavelength/

Answer 27

Red

Question 28

Which colour has the shortest wavelength?

Answer 28

Violet

Question 29

What is the colour of an object dependant on?

Answer 29

The wavelengths hitting it or the properties of an object

Question 30

What three things can happen when a light ray hits an object

Answer 30

It can be absorbed, transmitted or reflected

Question 31

What happens when a wave is absorbed?

Answer 31

The wave losses it's energy

Question 32

What happens when a wave is transmitted?

Answer 32

The wave travels into a new medium of travels through a medium

Question 33

What happens when a wave is reflected?

Answer 33

There is a change in the direction of the wavefront

Question 34

What light do Opaque objects transmit?

Answer 34

Opaque objects don't transmit any light. All the wavelength are absorbed or reflected. For example, if a cat is gray, gray waves will be reflected and all others will be absorbed.

Question 35

What happens when an object reflects two or more wavelengths?

Answer 35

The colours will mix to form a new one

Question 36

What do transparent objects transmit?

Answer 36

Transparent objects transmit almost all the light the hits them

Question 37

What light do translucent objects transmit?

Answer 37

Translucent objects transmit some of the light that hits them. The colour is determined by which colour wavelength is transmitted the most.

Question 38

What are the two types of reflection?

Answer 38

Diffuse and Specular reflection

Question 39

In which type of reflection are all normal parallel?

Answer 39

Specular reflection

Question 40

True or false: The normals are all parallel in diffuse reflection?

Answer 40

False

Question 41

When does diffuse reflection happen?

Answer 41

When the reflective surface is bumpy or unevenW