A radioactive sample has an activity \(A\) in air. If the sample is kept inside water, then its activity…
A radioactive sample has an activity \(A\) in air. If the sample is kept inside water, then its activity \(A^{\prime}\)
becomes less than \(A\)
becomes more than \(A\)
is same as \(A\)
will be less than or equal to \(A\) depending on the density of water
Solution
Activity of a radioactive sample does not depend on the type of medium in which it is kept. Hence, if the radioactive sample is kept inside water, then its activity \(\left(A^{\prime}\right)\) remains same as in air. i.e.,
\(A^{\prime}=A\)