DANB Radiation Health and Safety (RHS) Practice Exam

Which radiation is referred to as "soft radiation"?

1. Radiation with high energy

2. Radiation with long wavelengths

3. Radiation that produces fewer ions

4. Radiation with great penetrating power

The correct answer is: Radiation with long wavelengths

The term "soft radiation" is commonly used to describe radiation with long wavelengths. This type of radiation typically has lower energy compared to "hard radiation," which is associated with shorter wavelengths and greater energy. Soft radiation, such as low-energy X-rays or certain types of ultraviolet light, is generally less penetrating than hard radiation, meaning it is absorbed more readily by matter. Long wavelengths are characteristic of radiation that doesn’t have enough energy to ionize atoms efficiently. This is important in various applications, such as in dental radiography or radiographic imaging, where it's essential to minimize exposure while still obtaining sufficient diagnostic information. The understanding of soft radiation is crucial in determining safe exposure levels and conditions in medical and dental settings. This concept helps in differentiating between types of radiation based on their energy levels and interactions with matter, providing a fundamental basis in the field of radiation health and safety.