Unit of one of radiation absorbed is –
**Core Concept**
The question is testing the unit of measurement for radiation absorbed, a fundamental concept in radiation oncology and medical physics. The correct unit of measurement is related to the energy deposited by radiation in a given mass of tissue.
**Why the Correct Answer is Right**
The correct unit of measurement for radiation absorbed is the Gray (Gy). One Gray is defined as the absorption of one joule of radiation energy per kilogram of matter. This unit is used to express the amount of radiation absorbed by a tissue or material. The Gray is named after the British physicist Louis Harold Gray, who made significant contributions to the field of radiation biology.
**Why Each Wrong Option is Incorrect**
**Option A:**
This option is incorrect because it is not a unit of measurement for radiation absorbed. The unit of measurement for radiation exposure is actually the Roentgen (R), but it is not related to absorbed dose.
**Option B:**
This option is incorrect because it is not a unit of measurement for radiation absorbed. The unit of measurement for radiation energy is actually the Joule (J), but it is not related to absorbed dose.
**Option C:**
This option is incorrect because it is not a unit of measurement for radiation absorbed. The unit of measurement for radiation intensity is actually the Rad, but it is an older unit and has been largely replaced by the Gray.
**Clinical Pearl / High-Yield Fact**
The Gray is used to calculate the biological effect of radiation on living tissues, and it is an essential concept in radiation oncology for treating cancer patients.
**Correct Answer:** C. Gray