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N5 Physics > Waves > Flashcards

Waves Flashcards

1
Q

Waves are used to…

A

Transfer energy

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2
Q

Transverse waves

A

Waves where the direction of oscillation is perpendicular to the direction of energy transfer

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3
Q

Longitudinal waves

A

Waves where the direction of oscillation is parallel to the direction of energy transfer

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4
Q

Oscillation

A

Vibration

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5
Q

Example of transverse waves

A

Water waves, light waves, EM waves

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6
Q

Example of longitudinal waves

A

Sound waves

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7
Q

Crest

A

Highest point of a wave

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8
Q

Highest point of a wave

A

Crest

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9
Q

Trough

A

Lowest point of a wave

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10
Q

Lowest point of a wave

A

Trough

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11
Q

Amplitude

A

Half the vertical distance between the crest and trough

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12
Q

Half the vertical distance between the crest and trough

A

Amplitude

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13
Q

λ

A

Wavelength symbol

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14
Q

Wavelength symbol

A

λ

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15
Q

Wavelength

A

Horizontal distance between successive crests or troughs

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16
Q

Horizontal distance between successive crests or troughs

A

Wavelength

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17
Q

Wave speed

A

Distance travelled per unit time

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18
Q

Distance travelled per unit time

A

Wave speed

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19
Q

Period

A

Time taken for one wave to pass a point

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20
Q

Time taken for one wave to pass a point

A

Period

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21
Q

Frequency

A

Number of waves produced in one second

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22
Q

Number of waves produced in one second

A

Frequency

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23
Q

Diffraction

A

When waves spread because they pass an edge or gap in a barrier

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24
Q

When waves spread because they pass an edge or gap in a barrier

A

Diffraction

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25
Diffraction is greatest when the size of the gap...
Is the same as or less than the wavelength
26
Diffraction is the smallest when the size of the gap...
Is larger than the wavelength
27
Sound waves diffract more when...
The sound is lower pitched because of a large wavelength | Means the diffraction is less, so the wave spreads out more (less curve)
28
Ultrasound is good for medical purposes because...
Short wavelength means ultrasound curves more it's more precise for medical purposes | More diffraction means more curving, so less spread out
29
Long radio waves are less affected by buildings and tunnels because...
They can sometimes be received in the shadow of hills because of diffraction
30
Mediums EM waves travel through
Magnetic and electric fields
31
Speed of EM waves
The speed of light, 3 x 10^8 m/s
32
If the speed is fixed, there can be a family of EM waves because...
As the frequency decreases, wavelength increases and vice versa
33
EM waves in order of increasing frequency
Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, gamma rays
34
EM waves in order of increasing wavelength
Gamma rays, x-rays, ultraviolet, visible light, infrared, microwaves, radio waves
35
EM wave with the highest frequency
Gamma rays
36
EM wave with the greatest wavelength
Radio wave
37
Sources of gamma rays
Nuclear weapons, power stations
38
Source of x-rays
X-ray tube
39
Sources of ultraviolet
UV lamps, tanning beds
40
Sources of visible light
Lamps, LEDs
41
Sources of infrared
Heat lamps, LEDs
42
Sources of microwaves
Microwave transmitters, mobile phones
43
Sources of radio waves
Radio transmitters
44
Detectors of gamma rays
GM tube, photodiode
45
Detectors of x-rays
Photographic film, photodiode
46
Detectors of ultraviolet
Fluorescent ink, photodiode
47
Detectors of visible light
Retina of the eye, photodiode
48
Detector of infrared
Black-bulb thermometer, photodiode
49
Detector of microwaves
Antenna / ariel
50
Detector of radio waves
Antenna/ariel
51
Uses of gamma rays
Cancer treatment, radioactive tracers
52
Use of x-rays
Seeing broken bones, luggage scans
53
Uses of ultraviolet
Security marking, treating skin conditions
54
Uses of visible light
Vision
55
Uses of infrared
Scanning houses, remote controls
56
Uses of microwaves
Mobil phone signals, microwave ovens
57
Uses of radio waves
TV, radio communications
58
Refraction
Change in speed as a wave changes medium
59
In refraction, a bigger speed means...
Bigger angle between the ray and the normal
60
Red light has the lowest frequency so bends the...
least
61
Violet light has the highest frequency so bends the...
most

N5 Physics (6 decks)

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