Texas Industrial Radiography Gamma Practice Test

The energy of Gamma Rays is expressed by which of the following units of measurement?

1. The Rad

2. The Curie

3. KeV and MeV

4. Roentgen

The correct answer is: KeV and MeV

Gamma rays are a form of electromagnetic radiation, and their energy is quantified in electron volts (eV). Among the units of measurement for energy, the kiloelectronvolt (KeV) and the megaelectronvolt (MeV) are standard units used in the context of gamma radiation. One kiloelectronvolt is equal to 1,000 electronvolts, and one megaelectronvolt is equal to one million electronvolts. These units are particularly suited for the high energy levels typically associated with gamma rays, making them the correct choice for expressing gamma radiation energy. The other options represent different concepts related to radiation but do not relate directly to the measurement of energy itself: - The Rad is a unit of absorbed radiation dose, expressing the amount of energy deposited by ionizing radiation in a material. - The Curie is a unit of radioactivity that measures the decay rate of radioactive material rather than energy. - The Roentgen is a unit that measures the exposure to ionizing radiation in air, specifically related to the amount of X-ray or gamma radiation that will produce a certain amount of ionization in air. By focusing on KeV and MeV, you can accurately describe the energy levels at which gamma rays operate, reinforcing the