A ²²⁶Ra sample has half-life 4 days. The probability that a nucleus disintegrates within two half-lives is n/4. Find n.
Physics · Nuclear physics
JEE Mains Practice

Question

A ²²⁶Ra sample has half-life 4 days. The probability that a nucleus disintegrates within two half-lives is n/4. Find n.

G1 Physics · Accepted Answer

After two half-lives, survival probability is 1/4, so decay probability is 3/4=n/4. Hence n=3.