light and......... sound.

Question 1

A wave transfers _____________. It does not transfer ______________.

Answer 1

Energy, matter

Question 2

In a _______________ wave the vibration of the particles is perpendicular to the direction of energy transfer

Answer 2

transverse

Question 3

In a _______________ wave the vibration of the particles is parallel to the direction of energy transfer

Answer 3

longitudinal

Question 4

Transverse wave - the _______________ of the particles is __________________ to the direction of energy transfer

Answer 4

vibration/oscillation, perpendicular

Question 5

Longitudinal wave - the _______________ of the particles is __________________ to the direction of energy transfer

Answer 5

vibration/oscillation, parallel

Question 6

hello hoomans

Answer 6

how dare u get it wrong

Question 7

What feature of the wave is shown on the diagram

Answer 7

Amplitude

Question 8

In a longitudinal wave, areas where the particles are pushed together are called _________________ and areas where the particles are spread out are called _________________

Answer 8

compressions, rarefactions

Question 9

A louder sound will have a higher __________________.

Answer 9

amplitude

Question 10

A high-pitched sound will have a higher _________________

Answer 10

frequency

Question 11

Give an example of a longitudinal wave

Answer 11

sound

Question 12

Give an example of a transverse wave

Answer 12

light (also radio, microwaves, infra-red, UV, X-ray, gamma ray, water waves)

Question 13

An object which gives off light is known as….

Answer 13

luminous

Question 14

How can we see non-luminous objects?

Answer 14

because light is reflected off the object

Question 15

When light hits and object and “stops” it is known as…

Answer 15

absobtion

Question 16

When light hits and object and bounces off it is known as…

Answer 16

reflection

Question 17

A material that lets light through without scattering is known as…

Answer 17

transparent

Question 18

What is an opaque material?

Answer 18

A material that does not let light pass through

Question 19

An object that scatters light as it passes through is known as…

Answer 19

transluscent

Question 20

How does the angle of incidence compare to the angle of reflection?

Answer 20

they are equal/the same

Question 21

What is refraction?

Answer 21

The change in direction of a wave when it changes speed.

Question 22

When does refraction occur?

Answer 22

When a wave moves into a different substance

Question 23

If the speed of a wave decreases as it moves into a new substance it will bend _____________ the normal

Answer 23

towards

Question 24

If the speed of a wave increases as it moves into a new substance it will bend _____________ the normal

Answer 24

away from

Question 25

When the angle of incidence is greater than the critical angle, what will happen to the light?

Answer 25

All the light will be reflected/total internal reflection.

Question 26

If all the light is reflected with a material (e.g. a piece of glass), what is this known as?

Answer 26

Total internal reflection

Question 27

Give two examples of where total internal reflection is found in real-life applications

Answer 27

Periscopes (submarines), internal cameras (medicine), fibre-optic communications e.g. fast broadband, inspecting aircraft engines

Question 28

What is the name of the coloured circle around the pupil. It controls the size of the pupil

Answer 28

Iris

Question 29

What is the purpose of the lens in the eye?

Answer 29

To focus light onto the retina

Question 30

What do you call the black part of the eye? It is the opening that lets light in

Answer 30

Pupil

Question 31

What is the retina?

Answer 31

Light-sensitive layer at the back of the eye, made up of rods and cones

Question 32

What is the purpose of the optic nerve?

Answer 32

Carries messages from the retina to the brain.

Question 33

Why do we end up with an inverted image formed on our retina when we look at an object?

Answer 33

Because light is refracted by the cornea and lens in our eye.

Question 34

What three colours of light can our eyes detect?

Answer 34

red, green, blue

Question 35

What are the colours of the spectrum that make up white light?

Answer 35

Red, Orange, Yellow, Green, Blue, Indigo, Violet (use ROY G. BIV or Richard Of York Gave Battle In Vain to help you remember the order)

Question 36

The colour of a light depends on what feature of a wave?

Answer 36

Frequency

Question 37

When light enters a prism it splits into the colours of the spectrum, what do we call this effect?

Answer 37

Dispersion

Question 38

Why does a blue object appear blue when a white light is shone upon it?

Answer 38

It reflects blue light. It absorbs all other colours of light.

Question 39

Why do black objects appear black?

Answer 39

They absorb all colours that are shone on them. No light is reflected.

Question 40

When red and green light is combined, what colour is formed?

Answer 40

Yellow

Question 41

When red and blue light is combined, what colour is formed?

Answer 41

Magenta

Question 42

When blue and green light is combined, what colour is formed?

Answer 42

Cyan

Question 43

If a sound is becoming lower pitched, what is decreasing?

Answer 43

The frequency

Question 44

If a sound is becoming lower in volume, what is decreasing?

Answer 44

The amplitude

Question 45

What formula can we use to calculate the speed of sound?

Answer 45

speed = distance/time

Question 46

Do sound waves travel fastest in solid, liquid or gas?

Answer 46

Solid

Question 47

Do light waves travel fastest through a solid, liquid or gas?

Answer 47

Gas (light travels fastest through a vacuum)

Question 48

When calculating the speed of sound using an echo, what must you remember

Answer 48

The echo travels to an object and back again (you may need to double the distance or halve the time provided - take care!)