Waves (paper1)

Question 1

What does transmitted mean?

Answer 1

When a wave passes throughout medium without being reflected or absorbed

Question 2

What does absorbed mean?

Answer 2

When the wave disappears as the energy it carried was transferred into the material

Question 3

What can happen to a wave when it hits a boundary?

Answer 3

Reflected, refracted, transmitted or absorbed

Question 4

Which way does the light bend when slowing down?

Answer 4

Bends toward the normal

Question 5

Do lighter colours absorb more or less light?

Answer 5

Less

Question 6

What is white light?

Answer 6

A mixture of different frequencies(colours) of light

Question 7

Do electromagnets need a medium to travel through?

Answer 7

No

Question 8

Do darker colours absorb more or less light?

Answer 8

More

Question 9

What type of waves are the ones on top of waves?

Answer 9

Transverse waves

Question 10

Which way to the particles in water move as a wave passes?

Answer 10

Up and down, they don’t get carried

Question 11

When can refraction also happen?

Answer 11

When the properties of a material changes gradually.

Question 12

Do sound waves transfer energy?

Answer 12

Yes

Question 14

What type of waves are sound waves?

Answer 14

Longitudinal Waves

Question 14

What are types of electromagnet waves?

Answer 14

Microwaves, radio and light waves.

Question 16

Light from light bulbs or the sun is called what?

Answer 16

White light

Question 17

Which way do particles in the material of sound waves move?

Answer 17

Back and forth as the wave passes, like a slinky.

Question 18

What type of waves do earthquakes and explosions make?

Answer 18

Seismic waves, that travel through the earth.

Question 19

What type of waves are electromagnet waves?

Answer 19

Transverse waves

Question 20

What’s wave frequency?

Answer 20

The number of waves passing through a certain point each second.

Question 21

What’s frequency measured in?

Answer 21

Herts (Hz)

Question 22

For sound, what does the frequency determine?

Answer 22

The pitch(how high or low)

Question 23

For light, what does the frequency determine?

Answer 23

The colour

Question 24

What’s a period?

Answer 24

The time it takes for one wave to pass a certain point

Question 25

What’s a wavelength of a wave?

Answer 25

The distance from a point on a wave to the same point on the next wave

Question 26

What is wavelength and amplitude measured in?

Answer 26

Metres

Question 27

What's an amplitude?

Answer 27

How loud or quiet a sound is

Question 28

How do you measure the amplitude of a wave?

Answer 28

The maximum distance the wave has travelled measured to the medium point or rest point.

Question 29

What's the velocity?

Answer 29

The speed of the wave in the direction it's traveling.

Question 30

How do you calculate the speed of a wave?

Answer 30

Speed (m/s) = distance (m)divided by time(s)

Question 31

What changes the wave speed?

Answer 31

The type of medium it's travelling through. Light travels slowly in glass or water, quicker in a vacuum

Question 32

Where does refraction happen?

Answer 32

The interface(boundary) of 2 different media.

Question 33

What's another way to work out wave speed?

Answer 33

Speed (m/s) = frequency(Hz) x wavelength(m)

Question 34

Light traveling at what angle does not refract?

Answer 34

90 degrees

Question 35

Does each frequency travel at the same speed?

Answer 35

No

Question 36

How do we hear echoes?

Answer 36

When sound waves are reflected off a hard surface

Question 37

If the velocity changes, what else must also change?

Answer 37

Frequency, wavelength or both

Question 38

What doesn't change when a sound wave enters a different material?

Answer 38

The frequency

Question 39

What does a sound wave cause on the surface of a solid?

Answer 39

The pressure

Question 40

What does a change in pressure on the surface of a solid cause?

Answer 40

The particles to vibrate to allow the sound wave to move through.

Question 41

What are the vibrations passed on from a solid?

Answer 41

Longitudinal or transverse

Question 42

What does the density of a solid determine?

Answer 42

How vibrations of different frequencies affect it.

Question 43

What does the outer ear help?

Answer 43

Helps channel the vibrations into the hole.

Question 44

What are vibrations from the air converted into inside the ear?

Answer 44

Electrical impulses that are sent to the brain.

Question 45

Does the eardrum have a thick or thin membrane.

Answer 45

Thin so that the vibrations can make it vibrate

Question 46

What do the tiny bones do to the vibrations?

Answer 46

Amplify then(make them louder)

Question 47

Where is the liquid stored in the ear?

Answer 47

The cochlea.

Question 48

What in the cochlea detects the vibrations and converts them into electrical impulses?

Answer 48

Tiny hairs

Question 49

How do the impulses get to the brain?

Answer 49

Travel down the auditory nerve in neurones.

Question 50

What's the cochlea?

Answer 50

A coiled tube containing liquid.

Question 51

What frequencies can humans detect?

Answer 51

20Hz to 20,000Hz

Question 52

What does the base in the cochlea detect?

Answer 52

High frequencies

Question 53

What does the apex in the cochlea detect?

Answer 53

Low frequencies

Question 54

Is the base membrane thicker and stiffer than the apex membrane?

Answer 54

Yes

Question 55

What is the hair cell connected to?

Answer 55

The membrane and a neurone

Question 56

Which animals use ultrasound to communicate?

Answer 56

Bats, dolphins and mice

Question 57

What is sonar equipment used for?

Answer 57

Find depth of the sea and detect fish

Question 58

What do volcanoes and earthquakes make?

Answer 58

Infrasound

Question 59

Why is gel put on before an ultrasound scan?

Answer 59

To stop the ultrasound just being reflected

Question 60

What's a seismometers?

Answer 60

Something that detects a seismic waves

Question 61

What causes the direction of light to change?

Answer 61

The change in speed.

Question 62

Why does an object at the bottom of a pool look closer than it actually is?

Answer 62

Because light reflected by it changes direction when it leaves the water

Question 63

The greater the difference in what makes the light bend more?

Answer 63

The greater the difference in speed.