What is called: a) the coefficient of biological activity; b) an equivalent dose; c) the biological equivalent of an X-ray?

The coefficient of biological activity is equal to the ratio of the dose of radiation received by the body to the dose of gamma rays, which produce the same biological effect. The absorbed dose multiplied by the coefficient of biological activity is called the equivalent dose;
H = Dk
The biological equivalent of X-ray is 1 rem = 0.01 Sv.

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