100 REM is equivalent to how many Sv?

To understand the relationship between REM and Sv (Sievert), it's important to recognize what each unit measures. The REM (Roentgen Equivalent Man) is a unit used to measure the biological effect of ionizing radiation, particularly in the context of health physics. The Sievert is a unit that represents the dose of radiation that accounts for the effect it has on human tissue.

The conversion factor between REM and Sv is defined as follows: 1 Sv is equal to 100 REM. This means that when converting REM to Sv, you divide by 100. Therefore, if you have 100 REM, you can convert it to Sv by dividing:

100 REM ÷ 100 = 1 Sv.

This conversion reflects the fact that the Sievert provides a more standardized measure of biological effects of radiation, which is crucial in medical, occupational, and environmental contexts.

Thus, 100 REM is equivalent to 1 Sv, making this the correct answer. Understanding this conversion is vital for professionals dealing with radiation exposure and safety.