Asked in

If there is a radiation that has a half life of 10 days and you have it for 110 days what will be the fraction of radiation left?


User Avatar
Wiki User
July 12, 2009 5:32AM

110 days would be 11 half-life periods if the half-life is 10 days. That means at the end, 1/2 x 1/2 x 1/2 ... (11 times) would be left: 2-11, or about one part in two thousand.