Light and Sound ETT

Question 1

How does increasing a sound waves amplitude effect the sound?

Answer 1

The volume increases.

Question 2

What is Wavelength?

Answer 2

The length of one wave, from peak to peak or trough to trough.

Question 3

What is frequency measured in?

Answer 3

Hz, Hertz

Question 4

What will a wave with a high frequency sound like?

Answer 4

High pitched.

Question 5

What will a wave with a low frequency sound like?

Answer 5

Low pitched.

Question 6

What is it called when a sound wave gets reflected?

Answer 6

Echo

Question 7

Why are Echo’s always quieter than the original noise?

Answer 7

Some of the sound waves energy is absorbed into the surface of the material that the wave is bouncing off.

Question 8

What is echo location?

Answer 8

Using the time it takes an echo to be received to calculate the distance from a surface.

Question 9

Through which state does sound travel fastest?

Answer 9

Solid.

Question 10

Why does sound travel faster in water than in air?

Answer 10

The particles in water are closer together so it takes less time for each particle to transfer its energy to the next one.

Question 11

Name the 2 types of wave.

Answer 11

Transverse, Longitudinal

Question 12

In what direction do the particles oscillate in a transverse wave?

Answer 12

At 90 degrees to direction of the wave.

Question 13

In what direction do the particles oscillate in a Longitudinal wave?

Answer 13

Parallel to the direction of the wave.

Question 14

What type of wave is a sound wave?

Answer 14

Longitudinal

Question 15

What causes a sound wave?

Answer 15

A vibration

Question 16

Why cant a sound wave travel through a vacuum?

Answer 16

There are no particles to transfer the energy.

Question 17

What do all waves transfer?

Answer 17

Energy

Question 18

What is the speed of sound in air?

Answer 18

340 m/s

Question 19

Why do you see the flash of a firework before you hear the BANG!?

Answer 19

Light travels much faster then sound.

Question 20

Which part of the ear moves first when receiving a sound wave.

Answer 20

The ear drum.

Question 21

What is an echo?

Answer 21

A reflected sound wave.

Question 22

What is ultra sonic?

Answer 22

A sound with a frequency above 20 000 Hz

Question 23

What equation can you use to find the distance a sound wave has travelled?

Answer 23

Speed (m/s) = Distance (m) / Time (s)

Question 24

Describe a low pitched loud sound wave.

Answer 24

A wave that has a large amplitude and a low frequency.

Question 25

Describe a high pitched quiet sound wave.

Answer 25

A wave that has a low amplitude and a high frequency.

Question 26

What is the name of this part of the ear? ![]()

Answer 26

Auditory canal

Question 27

What is the nam of this part of the ear?

Answer 27

Ear Drum

Question 28

What is the name of this part of the ear?

Answer 28

Ossicles

Question 29

What is the name of this part of the ear?

Answer 29

Semi-Circular Canals

Question 30

What is the name of this part of the ear?

Answer 30

Cochlea

Question 31

What is the name of this part of the ear?

Answer 31

Auditory nerve

Question 32

Define Luminous

Answer 32

Something that gives out light

Question 33

Define Non Luminous

Answer 33

Any object that does not give out light.

Question 34

How do we see non luminous objects?

Answer 34

Light reflects of of the object and into our eyes.

Question 35

Define Transparent

Answer 35

Materials that allow light to pass through easily, the material does not absorbe very much of the light energy.

Question 36

Define Translucent

Answer 36

A material that allwos light to pass through but scatters the direction og the light so that you do not see a clear immage. i.e frosted glass

Question 37

Define Opaque

Answer 37

A material that does not let light pass through.

Question 38

How does light travel?

Answer 38

Light travels as a wave.

Question 39

Name the muscle that controls the size of your pupil.

Answer 39

Iris

Question 40

Name the two types of photo receptor in your eye.

Answer 40

Rods and Cones

Question 41

What is the name of the back of the eye where immages are recieved?

Answer 41

Retina

Question 42

What is white light made up of.

Answer 42

Aspectrum of coloured light.

Question 43

What piece of equipment can be used to separate white light?

Answer 43

Prism

Question 44

Name the two types of reflection.

Answer 44

Specular reflection diffuse reflection

Question 45

What type of reflection gives a clear immage.

Answer 45

Specular reflection

Question 46

What type of reflection do you get from a rough surface?

Answer 46

Diffuse reflection.

Question 47

What is the Law of reflection?

Answer 47

Angle of Incidence = Angle of reflection

Question 48

Define refraction.

Answer 48

Light changing direction as it travels through a medium with a different density.

Question 49

Name the two types of Lens.

Answer 49

Convex and concave

Question 50

What is the name of the point where rays of light converge behind a lens.

Answer 50

Focus or focal point.

Question 51

Why does the grass look green.

Answer 51

White light from the sun hits the grass all of the coloures of the spectrum of light are absorbed by the grass execpt for green light which is reflected.

Question 52

H

Question 53

How do light filters work?

Answer 53

They only transmit the same colour of light that they are and absorb the rest.

Question 54

How far behind a mirror does an object appear?

Answer 54

The same distence as the object is infront of the mirror.