Radiology General 1dd4d7df Gray equals A 100 rad B 1000 rad C 10000 rad D All High-Yield Explanation A i.e., 100 rads Rad (radiation absorbed dose) is energy deposited within living matter & is equal to 100 ergs/gm of tissue. Whereas, I gray is absorption of 1 joule energy by 1 kg living matter.