What is the unit of measurement for the effect of any type of radiation on man that is equivalent to one roentgen of gamma radiation to man?

The unit of measurement that corresponds to the effect of any type of radiation on humans, particularly in regards to ionizing radiation such as gamma rays, is the REM (Roentgen Equivalent Man). This unit quantifies the biological effect of radiation, taking into account not only the amount of energy deposited by radiation in tissue but also the sensitivity of that tissue to radiation.

When you encounter a measurement of one roentgen of gamma radiation, it is crucial to understand how this relates to biological impact. The REM provides a weighted measure that reflects that impact on the human body, helping to account for the varying effects of different types of radiation on human health. This makes it an appropriate and crucial metric in discussions of radiation safety, particularly in the context of occupational exposure in fields such as industrial radiography.

While the other units listed (Roentgen, Curie, and RAD) are important in their own contexts—Roentgen measures exposure to ionizing radiation, Curie quantifies the amount of radioactive material, and RAD indicates the absorbed dose of radiation—they do not take into account the biological effects on humans in the same way the REM does. Thus, the REM is the correct choice as it is specifically designed to assess the impact of radiation exposure on