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Electromagnetic Flashcards

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
Waves that are sometimes called heat or thermal radiation
Infrared
26
Caused by the motion of electrons in atoms as they jump between different orbits
Light waves
27
Produced by the motion of electrons in atoms
UV radiation and X-rays
28
EM wave that darkens the skin
UV Radiation
29
Used for examining the interiors of objects that are opaque to light, such as the human body
X-ray
30
EM wave produced by the motion of charged particles in nuclei
Gamma rays
31
is the radiation energy that travels and spreads out as it goes
EM spectrum
32
TRUE OR FALSE: Cool objects produce more energy radiation than hot objects
False, it's the opposite
33
Each particle contains a bundle of energy called _____________
photon
34
TRUE OR FALSE: There is a sharp division between one kind of wave in the EM spectrum
False, they don;t have any
35
Is a particle representing a quantum of light or other electromagnetic radiation
photon
36
TRUE OR FALSE: Photons carry energy proportional to the radiation frequency but has zero rest mass
true
37
EM wave that has the longest wavelength
radio waves
38
they are used to transmit radio and television signals
radio waves
39
reception of radio wave that have longer wavelength
Amplitude Modulation (AM)
40
radio wave that readily bends easily around buildings and other objects that might be present in their path
Amplitude Modulation (AM)
41
radio wave that has shorter wavelength
Frequency Modulation (FM)
42
radio wave where objects might obstruct them which results in poor signals
Frequency Modulation (FM)
43
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
Radio frequency (RF)
44
extremely high-frequency radio waves
microwaves
45
EM wave used in telecommunication such as cellphones
microwaves
46
used in electron paramagnetic resonance spectroscopy
microwave radiation
47
discovered the existence of infrared
herschel
48
light beyond the red part of the visible light spectrum where there is no visible light but even higher temperature
infrared
49
is the EM radiation with a wavelength longer than that of visible light
infrared
50
infrared light is closest in wavelength to visible light
near-infrared light
51
infrared light that is closer to the microwave region
far infrared
52
TRUE OR FALSE: Near-infrared light is very hot
False, it's not hot at all
53
TRUE OR FALSE: Far infrared lights are thermal, which means they can be experienced in the form of heat
True
54
can be used to remotely determine the temperature of object
Infrared radiation
55
process where infrared radiation is used to remotely determine the temperature of objects
thermography or pyrometry
56
portion of EM radiation that is visible to the human eye
visible light
57
are given off by anything that is hot enough to glow
light waves
58
TRUE OR FALSE: when all the waves of the visible light are seen together, they make white light
true
59
produced by high-temperature surfaces such as the sun
UV radiation
60
EM radiation that does not carry enough energy per quantum to ionize atoms or molecules
non-ionizing radiation
61
sunburn of the cornea
photokeratitis
62
type of EM wave used to prevent counterfeiters
UV rays
63
high-energy waves that have great penetrating power and are used extensively in medical applications and in inspecting welds
X-ray
64
in many languages, x-radiation is called ___________________--
Rontgen radiation
65
with the technique called ____________________________, a section of human body can be imaged using x-rays and computer technology
computer-assisted tomography
66
a medical procedure that is often used with chemoteraphy, which uses very high-frequency x-rays to destroy cancer cells
radiotheraphy
67
generated by radioactive atoms and in nuclear explosions, and are used in many medical application
gamma rays
68
TRUE OR FALSE: x-rays are more penetrating than gamma rays
False, it's the opposite
69
images of our universe has been taken in ______________
gamma rays
70
procedure where multiple concentrated beams of gamma rays are directed at the growth in order to kill the cancerous cells
gamma knife surgery
71
the energy produced by nuclear reactions at the core of the sun
electromagnetic radiation
72
TRUE OR FALSE: shortest and longest wavelengths are visible to our eyes
false, only medium wavelengths are visible
73
the radiation given off from the sun
solar spectrum
74
radiation has two basic carriers
particles and waves
75
can be defined as the process of emitting energy by particles and waves
radiation
76
two types of radiation
natural and man-made
77
are composed of unstable atoms that give off their excess energy until it becomes stable
radioactive materials
78
happens during the spontaneous change to be more stable
radioactive decay
79
one way to describe the radioactivity of an element is its ______________
half-life
80
is the time required for half of the original population of radiactive atoms to decay
half-life
81
damaging form of radiation
ionizing radiation
82
atomic nuclei consisting of two protons and two neutrons
alpha particles
83
fast-moving electrons ejected from the nuclei of atoms
beta particles
84
energetuc particles arriving at earth from outer space
cosmic radiation
85
basic unit used to measure exposure to ionizing radiation
sievert (Sv)
86
it is a way of measuring ionizing radiation in terms of the potential to cause harm
sievert
87
radiation exposure is expressed in _________
millisieverts (mSv) or microsieverts
88
older and non-standard SI used to measure radiation
REM (roentgen equivalent man)
89
TRUE OR FALSE: One sievert is one hundred times larger than one rem
true
90
long-term and low-level exposure to radiation
stochastic effect
91
exposure to high levels of radiation and become more severe as the exposure increases
non-stochastic effect
92
radiation effects in which the chance of occurence increases with the dose
stochastic effects
93
radiation effects that increase their severity as dose increases
non-stochastic effect
94
95
the basic unit used to measure exposure to ionizing radiation
sievert (Sv)
96
is also used in electron paramagnetic resonance spectroscopy
microwave radiation

Science Quiz Bee (5 decks)

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