Question

If the half life of a radioactive material is $100$ days then its half life after $10$ days will become

• A. $50$ days
• B. $200$ days
• C. $400$ days
• D. $100$ days

Answer 1

Answer: (D)

$100$ days

Half life is $\frac{{\log }_{e}2}{\lambda }$, where $\lambda$ is the decay constant.

As both Half-life and decay-constant remains constant. So in this case, it will remain $100days$ always.