Radiology Chapter 2 Radiation Physics Questions and Answers 100% Pass

Radiology Chapter 2 Radiation Physics Questions and Answers 100% Pass What is the fundamental unit of radiation exposure in air? The roentgen (R) What term is used to describe the amount of energy absorbed by a tissue from radiation? Dose Which particle has no electrical charge and a mass of 1 atomic mass unit? Neutron Which type of radiation has the greatest ability to ionize atoms? Alpha radiation What does the half-life of a radioactive material indicate? The time it takes for half of the radioactive atoms to decay. 2 Which of the following is a characteristic of beta radiation? It has a charge of -1 and a small mass. What type of electromagnetic radiation is used in diagnostic radiology? X-rays What is the most common source of background radiation for humans? Radon How does the energy of radiation affect its penetrating ability? The higher the energy, the more penetrating the radiation. What unit is used to measure the effective dose of radiation to humans? Sievert (Sv) What is the process called when a high-energy photon knocks an electron out of an atom? Ionization 3 What is the main difference between ionizing and non-ionizing radiation? Ionizing radiation has enough energy to remove electrons from atoms, while non-ionizing radiation does not. What type of radiation is typically used in medical imaging? X-rays and gamma rays What factor influences the amount of radiation exposure a person receives during a radiological exam? The distance from the radiation source What is the relationship between wavelength and energy in electromagnetic radiation? Shorter wavelengths have higher energy. What is the primary function of the lead apron in radiology? To reduce radiation exposure to the body, especially to sensitive tissues Which of the following is an example of a naturally occurring source of radiation? 4 Cosmic radiation What is the principle behind