CAMRT Radiography Practice Exam

True or False: When standing one meter away from the primary beam, the energy of the beam is approximately 0.01% of its original energy.

1. True

2. False

3. Only for some types of exposure

4. This is only applicable at greater distances

The correct answer is: True

The statement is true. When standing one meter away from the primary beam, the energy of the beam decreases significantly due to the principles of radiation attenuation and the inverse square law, which states that the intensity of radiation is inversely proportional to the square of the distance from the source. At a distance of one meter, the primary beam's intensity can indeed be reduced to about 0.01% of its original energy, making it essential for radiology professionals to understand how distance affects radiation exposure. This principle enhances safety protocols in radiology settings and underlines the importance of maintaining appropriate distances from the primary beam to minimize exposure to patients and staff.