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Radiation Physics

Total questions: 18

Worksheet time: 10mins

Name
Class
Date
1.

The electrostatic force of attraction that holds the negative electrons in their orbit

a)

Binding Energy

b)

Ionization Energy

c)

Electromagnetic Radiation

d)

Braking Radiation

2.

The amount of energy required to remove an electron from its orbit

a)

Ionization Energy

b)

Binding Energy

c)

Electromagnetic Radiation

d)

Braking Radiation

3.

The process by which radiation results in the formation of a negatively charged electron and a positively charged ion

a)

Binding Energy

b)

Braking Radiation

c)

Characteristic Radiation

d)

Ionization

4.

The number of protons in the nucleus

a)

Atomic number

b)

Atomic mass number

5.

The total number of protons and neutrons in the nucleus

a)

Atomic number

b)

Atomic mass number

6.

Quantum theory treats electromagnetic radiation as

a)

Photons

b)

Waves

c)

Particles

7.

The wave theory treats electromagnetic radiation as

a)

Photons

b)

Waves

c)

Particles

8.

Photons with shorter wavelengths have higher energy

a)

True

b)

False

9.

The energy of the photon and its wavelength are directly proportional

a)

True

b)

False

10.

Photons used in dental radiography have energies of

a)

10 - 120 KeV

b)

100 - 120 KeV

c)

10 - 20 KeV

11.

Characteristics of tungsten are ... (you can choose more than one answer)

a)

high melting point

b)

high atomic number

c)

high vapour pressure

d)

high thermal conductivity

12.

The effective focal spot is smaller than the actual focal spot

a)

True

b)

False

13.

When electrons from the cathode travel close to the nucleus of the tungsten atom, which will either decelerate this electron or stop it.

a)

Braking radiation

b)

Characteristic radiation

14.

When the cathode electron collides with the inner shell electron and ejects it causes ionization of the atom.

a)

Braking radiation

b)

Characteristic radiation

15.

When --- increases, the quality of the x-ray increases (you can choose more than one answer)

a)

exposure time

b)

tube current

c)

tube voltage

d)

target-patient distance

e)

filtration

16.

Milliamperage and exposure time are directly related

a)

True

b)

False

17.

The intensity of radiation is inversely proportional to the square of the distance from the source of radiation.

a)

True

b)

False

18.

If the distance between the patient and the target is increased to double, the intensity of the radiation will be...

a)

double the original intensity

b)

half the original intensity

c)

quarter the original intensity

d)

4 times the original intensity