What is the SI unit for exposure?

Prepare for the Kettering Safety Exam. Study with flashcards and multiple choice questions, each question offers hints and explanations. Get ready for your exam!

The SI unit for exposure is the Röntgen. This unit specifically measures the amount of ionization produced in air by X-ray or gamma radiation. The Röntgen is particularly relevant for assessing exposure levels in radiological contexts, as it quantifies the ability of radiation to ionize air, which is a crucial factor in understanding its potential biological effects.

In contrast, while the Sievert is a unit that measures the biological effect of radiation, and the Gray is used to indicate the absorbed dose of ionizing radiation, they do not directly measure exposure in the same way that the Röntgen does. Air kerma, although related to the energy transferred from radiation to air, also does not serve as the standard unit for exposure itself. Thus, among all the options, the Röntgen correctly identifies the SI unit for measuring exposure.

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