The gray is the SI unit of absorbed radiation dose, defined as the amount of radiation energy absorbed per unit mass. It is used to measure the amount of energy that a particular material, such as human tissue, absorbs from ionizing radiation.

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A Gray Is

Question 75

Multiple Choice

A gray is

A) the amount of radiation that produces 2.1 × 10⁹ units of charge in one cubic centimeter of air.
B) a unit used to measure the amount of radiation absorbed per gram of tissue.
C) a unit that measures both the energy and the penetrating power of different types of radiation.
D) the SI unit for radiation absorbed.
E) the amount of radioactive substance that undergoes 3.7 × 10¹⁰ disintegrations per second.

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