A measure of any type of radiation equal to 100 ergs of energy deposited in one gram of any type of material is?

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Multiple Choice

A measure of any type of radiation equal to 100 ergs of energy deposited in one gram of any type of material is?

Explanation:
Absorbed dose is defined as the energy deposited per unit mass. In the old cgs system, one rad is exactly 100 ergs of energy deposited in 1 gram of material. So when you have 100 ergs per gram, that corresponds to 1 rad. For context, the SI unit for absorbed dose is the gray, where 1 gray equals 1 joule per kilogram, which is the same as 100 rad. The other units, rem and sievert, are used for dose equivalents that include factors for radiation type and tissue sensitivity, so they’re not defined simply by energy deposited per gram. So the measure described—100 ergs deposited in 1 gram—fits rad perfectly.

Absorbed dose is defined as the energy deposited per unit mass. In the old cgs system, one rad is exactly 100 ergs of energy deposited in 1 gram of material. So when you have 100 ergs per gram, that corresponds to 1 rad.

For context, the SI unit for absorbed dose is the gray, where 1 gray equals 1 joule per kilogram, which is the same as 100 rad. The other units, rem and sievert, are used for dose equivalents that include factors for radiation type and tissue sensitivity, so they’re not defined simply by energy deposited per gram.

So the measure described—100 ergs deposited in 1 gram—fits rad perfectly.

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