Which unit is used to measure the dose of ionizing radiation?

The gray (Gy) is the correct unit for measuring the dose of ionizing radiation absorbed by matter, specifically biological tissue. One gray is defined as the absorption of one joule of radiation energy by one kilogram of matter. This unit is crucial in radiation safety as it quantifies the amount of radiation absorbed, which is directly related to the potential biological effects on living tissues.

In the context of radiation safety, understanding doses in grays allows professionals to assess exposure levels and implement safety protocols to protect individuals from harmful effects of radiation. Grays are commonly used in medical contexts, such as in radiation therapy for cancer treatment, where precise dose measurements are essential for effectiveness and safety.

The other units mentioned do not relate to the measurement of radiation dose. Currents measure the flow of electric charge, lumens refer to the amount of light emitted by a source, and hertz measures frequency, particularly the number of cycles per second in a periodic event. Thus, these units are not applicable in the context of ionizing radiation dosage.