In what unit is equivalent dose rate measured?

The equivalent dose rate is measured in Sieverts (Sv), which is a unit used to quantify the biological effect of ionizing radiation. This unit takes into account the type of radiation and its impact on living tissue, providing a measure of the potential for harm.

The concept of equivalent dose rate refers to the amount of radiation dose delivered over a specific period of time, allowing for a comparison of the potential biological effects of radiation exposure. The unit of Sieverts is particularly important in health physics and radiological protection, as it reflects not just the energy deposited by the radiation, but also the varying risks associated with different types of radiation.

The other options do not represent the equivalent dose rate correctly. Grays (Gy) measure absorbed radiation dose without regard to biological effect, and J/kg is a measure of energy per unit mass that is not equivalent to the biological impact of radiation. Sv^-1 suggests an inappropriate unit since it would imply an inverse relation to the dose, which does not apply to how radiation dosage is typically expressed. Thus, the correct choice for the equivalent dose rate is Sieverts (Sv).