One roentgen is defined as A) the amount of ionizing radiation that will produce 1/3 × 10−⁹ C of electric charge in 1 cm³ of air under standard conditions. B) the amount of radiation that deposits 10−² J of energy into 1 kg of absorbing material. C) the amount of radiation needed for ionization of an atom. D) the amount of radiation needed for dissociation of a molecule. E) the amount of radiation that deposits 1 erg of energy in 1 g of air.

Question

Quizplus · Accepted Answer

The definition of one roentgen is the amount of ionizing radiation that will produce 1/3 × 10−16 C of electric charge in 1 cm3 of air under standard conditions. This means that one roentgen is a measure of the ionizing ability of radiation in air.

One Roentgen Is Defined as