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N5 Physics > Waves > Flashcards

Waves Flashcards

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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
Q

Diffraction is greatest when the size of the gap…

A

Is the same as or less than the wavelength

26
Q

Diffraction is the smallest when the size of the gap…

A

Is larger than the wavelength

27
Q

Sound waves diffract more when…

A

The sound is lower pitched because of a large wavelength

Means the diffraction is less, so the wave spreads out more (less curve)

28
Q

Ultrasound is good for medical purposes because…

A

Short wavelength means ultrasound curves more it’s more precise for medical purposes

More diffraction means more curving, so less spread out

29
Q

Long radio waves are less affected by buildings and tunnels because…

A

They can sometimes be received in the shadow of hills because of diffraction

30
Q

Mediums EM waves travel through

A

Magnetic and electric fields

31
Q

Speed of EM waves

A

The speed of light, 3 x 10^8 m/s

32
Q

If the speed is fixed, there can be a family of EM waves because…

A

As the frequency decreases, wavelength increases and vice versa

33
Q

EM waves in order of increasing frequency

A

Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, gamma rays

34
Q

EM waves in order of increasing wavelength

A

Gamma rays, x-rays, ultraviolet, visible light, infrared, microwaves, radio waves

35
Q

EM wave with the highest frequency

A

Gamma rays

36
Q

EM wave with the greatest wavelength

A

Radio wave

37
Q

Sources of gamma rays

A

Nuclear weapons, power stations

38
Q

Source of x-rays

A

X-ray tube

39
Q

Sources of ultraviolet

A

UV lamps, tanning beds

40
Q

Sources of visible light

A

Lamps, LEDs

41
Q

Sources of infrared

A

Heat lamps, LEDs

42
Q

Sources of microwaves

A

Microwave transmitters, mobile phones

43
Q

Sources of radio waves

A

Radio transmitters

44
Q

Detectors of gamma rays

A

GM tube, photodiode

45
Q

Detectors of x-rays

A

Photographic film, photodiode

46
Q

Detectors of ultraviolet

A

Fluorescent ink, photodiode

47
Q

Detectors of visible light

A

Retina of the eye, photodiode

48
Q

Detector of infrared

A

Black-bulb thermometer, photodiode

49
Q

Detector of microwaves

A

Antenna / ariel

50
Q

Detector of radio waves

A

Antenna/ariel

51
Q

Uses of gamma rays

A

Cancer treatment, radioactive tracers

52
Q

Use of x-rays

A

Seeing broken bones, luggage scans

53
Q

Uses of ultraviolet

A

Security marking, treating skin conditions

54
Q

Uses of visible light

A

Vision

55
Q

Uses of infrared

A

Scanning houses, remote controls

56
Q

Uses of microwaves

A

Mobil phone signals, microwave ovens

57
Q

Uses of radio waves

A

TV, radio communications

58
Q

Refraction

A

Change in speed as a wave changes medium

59
Q

In refraction, a bigger speed means…

A

Bigger angle between the ray and the normal

60
Q

Red light has the lowest frequency so bends the…

A

least

61
Q

Violet light has the highest frequency so bends the…

A

most

N5 Physics (6 decks)

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