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Science Quiz Bee > Electromagnetic > Flashcards

Electromagnetic Flashcards

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1
Q

Are transverse waves that carry energy from one place to another

A

Electromagnetic waves

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2
Q

An EM wave consists of what?

A

Magnetic and Electric fields

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3
Q

How fast do EM waves move?

A

Speed of light

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4
Q

TRUE OR FALSE: EM waves are transverse waves

A

True

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5
Q

FILL IN THE BLANK: The oscillating electric and magnetic fields are _____________ to the direction in which the waves move

A

Perpendicular

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6
Q

How are EM waves measured

A

Cycles per second or Hertz (Hz)

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7
Q

Entire range of frequencies is referred to as what?

A

Electromagnetic spectrum

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8
Q

TRUE OR FALSE: EM waves require any medium to propagate energy

A

False, they do not require any

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9
Q

TRUE OF FALSE: A wave moves repeatedly from one position to another

A

True

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10
Q

It means to change regularlt in strength and direction

A

Oscillate

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11
Q

It refers to the number of complete vibrations per second of the field at a point along the path of the passing wave

A

Frequency

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12
Q

TRUE OR FALSE: The frequency also equals the vibration frequency of the wave’s source

A

True

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13
Q

The ____________ of an EM wave depends on its frequency and speed

A

Wavelength

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14
Q

Speed of light

A

3x10^8

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15
Q

What equation is used to define the wave properties of matter

A

de Broglie

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16
Q

What value defines the amount of energy that a photon can carry, according to the frequency of the wave in which it travels

A

h or Planck’s constant (6.626x10^-34)

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17
Q

EM waves are often classified by frequency in a scheme called the __________________

A

electromagnetic spectrum

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18
Q

TRUE OR FALSE: Frequency and wavelength has a direct relationship

A

False, they have an inverse

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19
Q

TRUE OR FALSE: Wavelength and energy has an inverse relationship

A

True

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20
Q

TRUE OR FALSE: Frequency and energy has a direct relationshio

A

True

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21
Q

These EM waves occupy a particular range of wavelength known as __________________

A

Band

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22
Q

Type of EM wave used mostly for communication

A

Radio waves

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23
Q

EM wave used for radar tracking, radio navigation, communications, medical diathermy, heating in microwave ovens, drying, and other industrial purposes

A

Microwave

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24
Q

EM wave that warms your skin

A

Infrared

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25
Q

Waves that are sometimes called heat or thermal radiation

A

Infrared

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26
Q

Caused by the motion of electrons in atoms as they jump between different orbits

A

Light waves

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27
Q

Produced by the motion of electrons in atoms

A

UV radiation and X-rays

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28
Q

EM wave that darkens the skin

A

UV Radiation

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29
Q

Used for examining the interiors of objects that are opaque to light, such as the human body

A

X-ray

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30
Q

EM wave produced by the motion of charged particles in nuclei

A

Gamma rays

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31
Q

is the radiation energy that travels and spreads out as it goes

A

EM spectrum

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32
Q

TRUE OR FALSE: Cool objects produce more energy radiation than hot objects

A

False, it’s the opposite

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33
Q

Each particle contains a bundle of energy called _____________

A

photon

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34
Q

TRUE OR FALSE: There is a sharp division between one kind of wave in the EM spectrum

A

False, they don;t have any

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35
Q

Is a particle representing a quantum of light or other electromagnetic radiation

A

photon

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36
Q

TRUE OR FALSE: Photons carry energy proportional to the radiation frequency but has zero rest mass

A

true

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37
Q

EM wave that has the longest wavelength

A

radio waves

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38
Q

they are used to transmit radio and television signals

A

radio waves

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39
Q

reception of radio wave that have longer wavelength

A

Amplitude Modulation (AM)

40
Q

radio wave that readily bends easily around buildings and other objects that might be present in their path

A

Amplitude Modulation (AM)

41
Q

radio wave that has shorter wavelength

A

Frequency Modulation (FM)

42
Q

radio wave where objects might obstruct them which results in poor signals

A

Frequency Modulation (FM)

43
Q

is a rate of oscillation in the range of about 3kHz to 300 GHz, which corresponds to the frequency of radio waves, and the alternating currents that carry radio signals

A

Radio frequency (RF)

44
Q

extremely high-frequency radio waves

A

microwaves

45
Q

EM wave used in telecommunication such as cellphones

A

microwaves

46
Q

used in electron paramagnetic resonance spectroscopy

A

microwave radiation

47
Q

discovered the existence of infrared

A

herschel

48
Q

light beyond the red part of the visible light spectrum where there is no visible light but even higher temperature

A

infrared

49
Q

is the EM radiation with a wavelength longer than that of visible light

A

infrared

50
Q

infrared light is closest in wavelength to visible light

A

near-infrared light

51
Q

infrared light that is closer to the microwave region

A

far infrared

52
Q

TRUE OR FALSE: Near-infrared light is very hot

A

False, it’s not hot at all

53
Q

TRUE OR FALSE: Far infrared lights are thermal, which means they can be experienced in the form of heat

A

True

54
Q

can be used to remotely determine the temperature of object

A

Infrared radiation

55
Q

process where infrared radiation is used to remotely determine the temperature of objects

A

thermography or pyrometry

56
Q

portion of EM radiation that is visible to the human eye

A

visible light

57
Q

are given off by anything that is hot enough to glow

A

light waves

58
Q

TRUE OR FALSE: when all the waves of the visible light are seen together, they make white light

A

true

59
Q

produced by high-temperature surfaces such as the sun

A

UV radiation

60
Q

EM radiation that does not carry enough energy per quantum to ionize atoms or molecules

A

non-ionizing radiation

61
Q

sunburn of the cornea

A

photokeratitis

62
Q

type of EM wave used to prevent counterfeiters

A

UV rays

63
Q

high-energy waves that have great penetrating power and are used extensively in medical applications and in inspecting welds

A

X-ray

64
Q

in many languages, x-radiation is called ___________________–

A

Rontgen radiation

65
Q

with the technique called ____________________________, a section of human body can be imaged using x-rays and computer technology

A

computer-assisted tomography

66
Q

a medical procedure that is often used with chemoteraphy, which uses very high-frequency x-rays to destroy cancer cells

A

radiotheraphy

67
Q

generated by radioactive atoms and in nuclear explosions, and are used in many medical application

A

gamma rays

68
Q

TRUE OR FALSE: x-rays are more penetrating than gamma rays

A

False, it’s the opposite

69
Q

images of our universe has been taken in ______________

A

gamma rays

70
Q

procedure where multiple concentrated beams of gamma rays are directed at the growth in order to kill the cancerous cells

A

gamma knife surgery

71
Q

the energy produced by nuclear reactions at the core of the sun

A

electromagnetic radiation

72
Q

TRUE OR FALSE: shortest and longest wavelengths are visible to our eyes

A

false, only medium wavelengths are visible

73
Q

the radiation given off from the sun

A

solar spectrum

74
Q

radiation has two basic carriers

A

particles and waves

75
Q

can be defined as the process of emitting energy by particles and waves

A

radiation

76
Q

two types of radiation

A

natural and man-made

77
Q

are composed of unstable atoms that give off their excess energy until it becomes stable

A

radioactive materials

78
Q

happens during the spontaneous change to be more stable

A

radioactive decay

79
Q

one way to describe the radioactivity of an element is its ______________

A

half-life

80
Q

is the time required for half of the original population of radiactive atoms to decay

A

half-life

81
Q

damaging form of radiation

A

ionizing radiation

82
Q

atomic nuclei consisting of two protons and two neutrons

A

alpha particles

83
Q

fast-moving electrons ejected from the nuclei of atoms

A

beta particles

84
Q

energetuc particles arriving at earth from outer space

A

cosmic radiation

85
Q

basic unit used to measure exposure to ionizing radiation

A

sievert (Sv)

86
Q

it is a way of measuring ionizing radiation in terms of the potential to cause harm

A

sievert

87
Q

radiation exposure is expressed in _________

A

millisieverts (mSv) or microsieverts

88
Q

older and non-standard SI used to measure radiation

A

REM (roentgen equivalent man)

89
Q

TRUE OR FALSE: One sievert is one hundred times larger than one rem

A

true

90
Q

long-term and low-level exposure to radiation

A

stochastic effect

91
Q

exposure to high levels of radiation and become more severe as the exposure increases

A

non-stochastic effect

92
Q

radiation effects in which the chance of occurence increases with the dose

A

stochastic effects

93
Q

radiation effects that increase their severity as dose increases

A

non-stochastic effect

94
Q
A
95
Q

the basic unit used to measure exposure to ionizing radiation

A

sievert (Sv)

96
Q

is also used in electron paramagnetic resonance spectroscopy

A

microwave radiation

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