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COLLEGE(2) SEMIS > RADPRO MODULE 5 > Flashcards

RADPRO MODULE 5 Flashcards

1
Q

photons are known

A

electromagnetic energy

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2
Q

properties of EME

A

frequency, wavelength, velocity, and amplitude.

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3
Q

energy exists over a wide range called an energy

A

continuum

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4
Q

is an uninterrupted (continuous) ordered sequence.

A

continuum

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5
Q

the only EME apparent to us

A

visible light

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6
Q

smallest quantity of any type of electromagnetic energy

A

photon

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7
Q

the smallest quantity of an element

A

atom

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8
Q

It may be pictured as a small bundle of energy

A

photon

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9
Q

that travels through space at the speed of light

A

quantum

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10
Q

who showed that visible light has both electric and magnetic properties, hence the term electromagnetic energy

A

James Clerk Maxwell

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11
Q

speed of lgiht

A

3 𝑥 10^8 m/s.

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12
Q

Physicists use the term ____ to describe interactions among different energies, forces, or masses that can otherwise be described only mathematically

A

field

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13
Q

governs the interaction of different masses.

A

gravitational field

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14
Q

governs the interaction of electrostatic charges

A

electric field

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15
Q

the interaction of magnetic poles.

A

magnetic field,

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16
Q

½ of the range from 1 crest to valley over which the sine wave varies.

A

amplitude

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17
Q

highest point of sine wave

A

crest

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18
Q

lowest point of sine wave

A

valley

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19
Q

what is constant in the electromagnetic energy

A

velocity (c)

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20
Q

(λ).

A

lambda wavelength

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21
Q

usually identified as cycles per second.

A

frequency

22
Q

SI of frequency

A

hertz

23
Q

frequency that is audible

A

20 hz to 20khz

24
Q

number of wavelengths that pass a point of observation per second

A

Frequency

25
Q

the distance from one crest to another, from one valley to another, or from any point on the sine wave to the next corresponding point.

A

wavelength

26
Q

what will happen to wavelength if the frequency increase

A

reduced

27
Q

note

A

The wave amplitude is not related to wavelength or frequency.

28
Q

wave equation

A

Velocity = Frequency x Wavelength or 𝑣=𝑓λ

29
Q

frequency range of electromagnetic energy extends from approximately

A

102 to 1024 Hz

30
Q

The photon wavelengths associated with these radiations are approximately

A

107 to 10-16 m

31
Q

Three regions of electromagnetic radiation most important to radiologic science:

A

1.Visible light
2.X-ray and gamma radiation
3.Radiofrequency (RF)

32
Q

wavelength, measured in

A

nanometers

33
Q

x-rays are described in terms of a unit of energ

A

electron volt (eV).

34
Q

This deviation in line of trave

A

refraction

35
Q

Sunlight also contains two types of invisible light

A

INFRARED AND ULTRAVIOLET

36
Q

consists of photons with wavelengths longer than those of visible light but shorter than those of microwaves

A

Infrared light

37
Q

located in the electromagnetic spectrum between visible light and ionizing radiation.

A

Ultraviolet light

38
Q

Communication broadcasts are usually identified by their frequency of transmission and are called

A

radiofrequency (RF) emissions

39
Q

behave more like waves.

A

Visible light

40
Q

behave more like particles

A

X-ray photons

41
Q

interact with electrons and atoms

A

X-rays

42
Q

– interacts with molecules

A

UV light

43
Q

measured in nanometers (interacts with living cells)

A

Visible light

44
Q

measured in centimeters (interacts with objects of same size)

A

Microwaves

45
Q

measured in meters (interacts with metal rods called antennas

A

Radio & TV waves

46
Q

Structures that absorb x-rays are

A

radiopaque

47
Q

structure that transmit light

A

radiolucent

48
Q

This decrease in intensity is inversely proportional to the square of the distance of the object from the source

A

inverse square law

49
Q

X-ray energy ranges from approximatel

A

10 keV to 50 MeV.

50
Q

Planck’s constant and (h)

A

4.15 × 10-15 eVs or
6.63 × 10-34 Js.

COLLEGE(2) SEMIS (12 decks)

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