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Physics - Chapter 3 Flashcards | StudBud
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Physics - Chapter 3
Physics - Chapter 3
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1
What is the velocity of light?
3 x 1012 m/s
8 x 103 m/s
2.45 x 108 m/s
3 x 108 m/s
2
What is the name of the theory states that x-rays can only exist at the speed of light.
Inverse square law
Planck's quantum theory
Einstein's theory of relativity
Wave theory
3
The three regions of the electromagnetic spectrum that are most important in radiographic sciences are ___,___, and___.
radiofrequency, IR, and x-rays
x-rays, gamma rays, and radiofrequency
x-rays, radiofrequency and visible light
Ultraviolet light, x-rays, and microwaves
4
A photons energy is inversely proportionate to its frequency.
True
False
5
Which of the following statements are true pertaining to the image below?
Wave C has the lowest frequency
Wave A has the shortest wavelength
Wave C has the highest frequency
Wave B has the longest wavelength
6
_________
is the smallest portion of the electromagnetic spectrum, but the only one that can be seen by they human eye.
visible light
IR
radio waves
x-rays
7
Visible light interacts with matter through reflection, transmission, absorption, and attenuation.
True
False
8
What word best describes the x-ray beam diverges equally in all directions.
isolated
isotropic
attenuation
isomer
9
All medical imaging uses electromagnetic energy expect_________.
MRI
radiation therapy
ultrasound
CT
10
Which of the following is the formula for the inverse square law?
\frac{I_1}{I_2}=\frac{d_2}{d_1}
\frac{I_1}{I_2}=\frac{d_1^2}{d_2^2}
\frac{I_1}{I_2}=\frac{d_2^2}{d_1^2}
\frac{I_1}{I_2}=\frac{d_1}{d_2}
11
The number of cycles or wavelengths of a simple harmonic motion per unit of time. Expressed in Hertz
sine wave
amplitude
wavelength
frequency
12
When x-rays are emitted from the tube the intensity of the beam rapidly increases with the distance from the source.
False
True
13
The velocity of all electromagnetic energy is constant.
False
True
14
Theory that electromagnetic energy travels through space in the form of waves.
Wave Theory
Planck's Theory
Quantum Theory
Law on inertia
15
Which of the following wave variables are needed to describe electromagnetic energy?
All of the above
wavelength
frequency
velocity
16
Distance between similar points on a sine wave; the length of one cycle.
wavelength
sine wave
frequency
amplitude
17
What is the mass of a photon?
3 x 108
1
0
2.54
18
The smallest quantity of any type of electromagnetic radiation is a _______.
electron
Photon
atom
radiowave
19
Gamma rays are produced outside the nucleus of an excited atom.
True
False
20
X-ray photons have a much higher frequency and shorter wavelength than visible light photons.
False
True
21
Photons have ______ charge.
zero
a positive
a negative
a varying
