Physics 2 HW 4-6B

Question 1

For a given energy beam, the penetration ______ with ______ atomic number.

A. Decreases, lower
B. Increases, Lower
C. Increases, Increases
D. Decreases, decreases

Answer 1

B. Increases, Lower

Question 2

Which of the following decreases x-ray quality?

A. Increasing Kvp
B. Increasing mAs
C. All answers are correct
D. Decreasing filtration

Answer 2

D. Decreasing Filtration

Question 3

Which of the following does NOT affect x-ray quality?

A. None of the answers
B. All of the answers
C. filtration
D. mAs
E. Kvp

Answer 3

D. mAs

Question 4

When we describe the attenuation of x-ray as being exponential, we mean that for each unit of thickness of material they are

A. None of the answers
B. Attenuated by a constant percentage or proportion
C. They are attenuated by one half value layer
D. Preferentially attenuated at the lower energies

Answer 4

B. Attenuated by a constant percentage or proportion

Question 5

With respect to a 15 MV x-ray beam, what is true about a 6 MV x-ray beam>

A. The 6 MV beam is higher quality
B. The 15 MV beam has a higher quality
C. The 6 MV beam is attenuated more rapidly
D. The 6 MV beam has more penetration

Answer 5

C. The 6 MV beam is attenuated more rapidly

Question 6

Check the box for each parameter below that affects beam quality

A. Distance
B. Total Charge of collected
C. KVP
D. Current
E. Filtration

Answer 6

C. KVP and E. Filtration

Question 7

Increasing filtration to an x-ray beam will decrease the

A. Quality of the beam
B. Maximum energy of the beam
C. Quantity of x-rays in the beam
D. Most probable energy of the beam

Answer 7

C. Quantity of x-ray in the beam

Question 8

For the given data, what is the half value layer of the beam

Absorbed thickness Reading
0 60
3.0 50
6.4 44
9.8 35
13.1 30
16.2 24
19.2 21
25.5 16
28.8 13

Answer 8

13.1 is the answer

Question 9

When waves seem to bend around an obstacle (such as waves around a wall) what is this called

A. Diffraction
B. None of the above
C. Refraction
D. Reflection

Answer 9

A. Diffraction

Question 10

When white light displays as a band of colors after passing through a prism, this is an example of

A. Diffraction
B. Dispersion
C. Refraction
D. Reflection

Answer 10

C. Refraction

Question 11

When waves bounces off the surface of a barrier this is called

A. Diffraction
B. None of the above
C. Refraction
D. Reflection

Answer 11

D. Reflection

Question 12

The intensity of electrons created by photoelectric production can be increased by

A. Decreasing the wavelength of the photons
B. All of the answers are right
C. Increasing the number of photons
D. Increasing the frequency of the photons

Answer 12

C. Increasing the number of photons

Question 13

What is the energy of a photon beam if the frequency is 4.25 x 10(23) hertz?
H= 4.15 x 10(15) eVs

A. 1.76 Mev
B. 176 kev
C. 1.76 Gev
D. 176 MeV

Answer 13

C. 1.76 GeV

Question 14

The double slit experiment is an example of how sub atomic particles

A. Diffuse at the interface of two media
B. Refract at the interface of two media
C. Behave like waves
D. Interact with fluid media

Answer 14

C. Behave like waves

Question 15

When sub atomic particles are directed at a small single slit, the resulting distribution is

A. A pattern of wave interference
B. A pattern of two bunches
C. A single bunch pattern
D. A pattern of three bunches

Answer 15

C. A single bunch pattern

Question 16

Food is commonly heated with microwaves. Why are radio waves not used for heating food?

A. Radio waves require too large of an energy source
B. Radio waves are used for heating on an industrial scale
C. Electromagnetic energy reacts most with particles whose size is close to their wavelength
D. Radio waves energy is too low

Answer 16

C. EM energy reacts most with particles whose size is close to their wavelength

Question 17

Increasing the energy of electromagnetic radiation is associated with

A. Decreasing penetration of the wave
B. Increasing wavelength
C. Increasing number of electrons created by photo nuclear reaction
D. Increasing frequency

Answer 17

D. Increasing frequency

Question 18

Eisenstein’s theory of relatively shows that

A. Mass can be converted into energy
B. All answers are correct
C. Energy is related to mass
D. The speed of light is constant in a vacuum

Answer 18

All of the answers are correct

Question 19

What type of interaction produces a photon of equal energy to the initial photon?

A. Photoelectric
B. Pair Production
C. Coherent
D. Compton

Answer 19

C. Coherent

Question 20

Which type of radiation interaction is predominant at diagnostic radiographic energies

A. Photoelectric
B. Coherent
C. Pair Production
D. Compton

Answer 20

A. Photoelectric

Question 21

Which of the following interactions does not result in complete absorption of the photon?

A. Photoelectric effect
B. Compton
C. Pair Production
D. Photodisintegration

Answer 21

B. Compton

Question 22

With which type of electrons does the photoelectric interaction usually occur?

A. Inner shell electrons
B. Any electrons
C. Valence shell electrons
D. Free electron

Answer 22

A. Inner shell electrons

Question 23

Which of the following is a possible product after photoelectron interactions?

A. Characteristic x-ray
B. Scattered photon
C. All answers are correct
D. Auger electron
E. Characteristic x-ray and Auger electron

Answer 23

E. Characteristic X-ray and Auger electron

Question 24

Which type of photon interaction requires a photon of at least 1.02?

A. Coherent
B. Compton
C. Photoelectric
D. Pair Production

Answer 24

D. Pair production

Question 25

Which type of photon interaction is NOT inversely proportional to the photon energy?

A. Photoelectric
B. Coherent
C. Pair Production
D. Compton

Answer 25

C. Pair Production

Question 26

Photons are more likely to interact with matter which is

A. Low atomic numbers
B. At rest energy near the photon energy
C. Equal to the kinetic energy of the orbital electron
D. Similar in size to the wavelength of the photon

Answer 26

D. Similar in size to the wavelength of the photon

Question 27

Which is true about Compton scattering

A. The incident photon energy is much greater than the binding energy of the electron
B. It is independent of the atomic mass
C. The photon is absorbed by the atom
D. The scattering photon gains energy

Answer 27

A. The incident photon energy is much greater than the binding energy of the electron

Question 28

Which type of photon interaction is it when all the photon energy is given to the nucleus of the atom

A. Compton
B. Photoelectric
C. Coherent
D. Pair Production

Answer 28

D. Pair Production