Waves Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Transverse waves

A

Particles move/ vibrate perpendicular to the transfer of energy

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

Longitudinal waves

A

Particles move/vibrate parallel to the transfer of energy

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

Examples of transverse waves

A

Ocean waves, All EMS waves, S waves

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

Examples of longitudinal waves

A

Sound, P-waves

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

Label a transverse wave

A

Peak, trough, amplitude, wavelength, frequency

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

Label a longitudinal wave

A

Compression, rarefaction, wavelength, frequency

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

What is frequency & its equation

A

Number of waves per second
1/period(time)

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

When will an objects temperature increase (radiation)

A

If it absorbs more infra-red than it gives out

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

What is the definition of a perfect black body

A

Something that absorbs and emits all wavelengths of radiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the speed of light

A

300,000,000 m/s

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

Similarities between all EM waves

A

Transverse
Reflected
Refracted
Polarised

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

What does it mean if a wave is polarised

A

It’s vibrations are confined to single plane

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

Dangers of All EMS

A

Radio- None
Microwaves- Cause water to vibrate- damage brain
Infra-Red- Cause us to be too hot
Visible- Blind us if too much
Ultra-violet- Ionising cancer
X-rays- Ionising cancer
Gamma- Ionising cancer

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

Uses of all EMS

A

Radio- TV and Radio
Microwaves- Heat up food, satellite communication
Infra-Red Remote controls, cooking food
Visible- To see, fibre optics
Ultra violet- Scans, to get tanned
X-rays Medical Imaging
Gamma Treatments

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

Which states of matter does sound travel the fastest and slowest in

A

Fastest in solids, slower in gases

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

What does sound need to be able to pass through

A

A medium

17
Q

Range of human hearing

A

20-20000Hz

18
Q

Increased amplitude in sound

A

Louder

18
Q

Increased frequency in sound

A

Higher pitched

19
Q

Uses of ultrasound

A

Produce medical images of the body

20
Q

What can p-waves pass through

A

Solids and liquids

21
Q

What can s-waves pass through

A

Solids

22
Q

Properties of a reflection in a mirror

A

Virtual
Equal in size, equal in distance from mirror
Laterally inverted
Same way up

23
Q

How does refraction occur

A

When a wave hits a different medium at an angle, some parts of the wave hit the medium sooner, when going into a different medium the wave changes speed, to catch up with this different speed wave, the entire wave turns
Bends towards the normal

24
Q

Convex vs concave lenses

A

Convex is fatter at the centre
Concave is thicker at the ends

25
Q

Are convex lenses producing real or virtual images

A

Can be both

26
Q

Concave produce real or virtual images

A

Virtual

27
Q

Real image definition

A

Actual intersection of light rays

28
Q

Virtual image definition

A

Imaginary intersection of light rays

29
Q

Why does something appear to our eyes red

A

It absorbs all visible light apart from red which it reflects

30
Q

If all wavelengths are absorbed by an object it is

A

Black

31
Q

If all wavelengths are reflected by an object it is

A

White

32
Q

How does a white light shining through red filter work

A

Absorbs all light apart from red

33
Q

White light through red filter and green filter projects

A

Nothing

34
Q

Angle reflection law

A

Angle of incidence = angle of reflection

35
Q
A