Multiple choice

The unit of radioactive measurement used to describe an amount of gamma and X-rays in air is

  1. radiation absorbed dose

  2. roentgen equivalent man

  3. curie

  4. roentgen

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The roentgen is a unit used to measure a quantity called exposure. The roentgen measures the energy produced by gamma radiation in a cubic centimeter of air. This can only be used to describe an amount of gamma and X-rays, and only in air. One roentgen is equal to depositing in dry air enough energy to cause 2.58E-4 coulombs per kg. It is a measure of the ionizations of the molecules in a mass of air.

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