Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics Y11 > P1.5 > Flashcards

P1.5 Flashcards

1
Q

Sound waves…

A

…are vibrations in a medium and cannot travel through a vacuum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a mechanical wave?

A

Vibrations that travel through a substance (cannot travel through a vacuum) - can be traverse or longitudinal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What do waves transfer?

A

Energy, communications and information

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a longitudinal wave?

A

The oscillations are parallel to the direction of energy transfer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a transverse wave?

A

The oscillations are perpendicular to the direction of energy transfer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is an example of a longitudinal wave?

A

Sound waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is an example of a transverse wave?

A

Electromagnetic waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Longitudinal show areas of compression and rarefraction

A

Compression= squashed together and rarefraction = spread apart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Name the waves in the electromagnetic spectrum

A 
Rapid - radio
Monkeys - microwave
In - infrared
Velvet - visible
Underpants - ultra violet
eXcrete - X-rays
Gummybears - gamma
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Radio waves have…

A

…little energy, low frequency and low wavelength (10 power15)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Gamma waves have…

A

…most energy, highest frequency & highest wavelength (10 power4)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Waves can be…

A

…relflected, refracted and diffracted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is reflection?

A

Image is formed that is virtual, upright and laterally inverted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The angle of incidence=

A

The angle of reflection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is refraction?

A

The change of direction of a light ray as it passes across a boundary between two transparent substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What happens to the wave when it goes from air to glass?

A

It bends towards the normal and slows down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What happens to the wave when it goes from glass to air?

A

It bends away from the normal and speeds up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What happens to the wave when it goes from air to glass at 90 degrees/along the normal?

A

It does not refract/carries on at 90degrees

19
Q

What is the amplitude of a wave?

A

The height of a wave crest or a wave trough of a transverse wave from the rest position

20
Q

What is the wavelength of a wave?

A

The distance of one wave crest to the next wave crest - measured in m

21
Q

What is the frequency of a wave?

A

The number of wave crests passing a fixed point every second - measured in hertz

22
Q

What is the wave speed of a wave?

A

Wavelength x frequency

23
Q

What are radio waves used for?

A

Communications - tv, radio and mobile phone signals

24
Q

What are microwaves used for?

A

Cooking and communications - phones and tv

25
Q

What are infrared waves used for?

A

Communications - remote controls & optical fibres

26
Q

What are visible waves used for?

A

Communications - photography

27
Q

What are ultra violet waves used for?

A

Sunbeds & forged bank notes

28
Q

What are x-Rays used for?

A

Bone fractures & seeing inside the body

29
Q

What are gamma rays used for?

A

Grating cancer & sterilising equipment

30
Q

What are reflected sound waves known as?

A

Echos

31
Q

What affects the pitch of a note?

A

The frequency of a wave

32
Q

What affects the volume of a wave?

A

The amplitude of the wave

33
Q

What is diffraction?

A

The spreading of waves when they pas through a gap or around the edge of an obstacle which has a similar size as the wavelength of the waves

34
Q

What is the Doppler effect?

A

The change of wavelength and frequency of a wave (light from galaxies, sounds or microwaves) as it moves towards or away from the observer

35
Q

What is red-shift?

A

The movement of a wave towards the red end of the spectrum so the wave moves away from the observer - increased wavelength and decreased frequency

36
Q

What is blue-shift?

A

The movement of a wave towards the blue end of the spectrum so the wave moves towards the observer - decreased wavelength and increased frequency

37
Q

Red shift =

A

Evidence the universe is expanding

38
Q

Red-shift of galaxies?

A

Light from distant galaxies are moving away from us so have an increased wavelength and decreased frequency - the light appears more red

39
Q

What does the further away the distant galaxies tell us about them?

A

The faster the galaxies are moving and the bigger increase in wavelength

40
Q

What is the Big Bang theory?

A

The theory the universe started from a very small initial point

41
Q

What is cosmic microwave background radiation?

A

Electromagnetic radiation which fills the universe. It comes from the radiation present after the Big Bang so provides evidence for the Big Bang theory

42
Q

What are electromagnetic waves?

A

Electric or magnetic disturbances that transfer energy from one place to another.
They travel through a vacuum at the same speed (3000000km/s = speed of light)

43
Q

What is the problem with using your mobile phone a lot (especially near you head)?

A

Microwaves are transferred between your phone and the bearest transmitter
Some wavelengths of microwaves are absorbed by water and heats it up so this happens with the water in your cells and so lead to damaged health but there’s no evidence yet

Physics Y11 (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions