IGNOU MME 11 2026 - What is the relationship between Rad, Rem, Gray & Sievert?

Question

What is the relationship between Rad, Rem, Gray & Sievert?

17 Feb 2026

Answer :

Word Count : 310

Rad, Rem, Gray, and Sievert are all units of measurement related to the amount of radiation exposure, but they are used in different contexts to describe the physical quantity of radiation and its biological effects. The Rad (Radiation Absorbed Dose) is a unit that measures the amount of energy absorbed by a substance, such as human tissue, from ionizing radiation. One Rad is equivalent to the absorption of 0.01 joules of energy per kilogram of matter. The Rem (Roentgen Equivalent Man)

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