Exam Questions and
Answers
Matter
Ans- Anything that occupies space.
The fundamental, complex building blocks of matter are atoms and molecules.
Energy
Ans- Ability to do work.
Measured in joules (J) in SI system.
In Radiology eV is used.
Potential Energy
,Kinetic Energy
Chemical Energy
Electrical Energy
Thermal Energy
Nuclear Energy
Electromagnetic Energy
Ans- Different Types of Energy:
Radiation
Ans- The transfer of energy.
The energy emitted and transferred through space.
Ionizing Radiation
Ans- A special type of radiation that includes x-rays.
Ionizing radiation is any type of radiation that is capable of removing an orbital
electron from the atom with which it interacts.
This type of interaction between radiation and matter is called ionization.
,Natural Environmental Radiation
Man-made Radiation
Ans- Sources of Ionizing Radiation:
Cosmic rays
Terrestrial radiation
Internally deposited radionuclides
Radon
Ans- Natural Environment Radiation:
Diagnostic x-ray
Nuclear power generation
Research applications
Industrial sources
Consumer items
Ans- Man-made Radiation:
, Particulate
Electromagnetic
Ans- Types of Ionizing Radiation:
Alpha particle
Beta particle
Ans- Particulate Radiation:
Alpha particle
Ans- Equivalent to a helium nucleus.
Two protons and two neutrons.
Mass = 4 amu.
2 units of positive electrostatic force.
Beta particle
Ans- Light particles with an atomic mass number of 0.