The half life $(T)$ and the disintegration constant $(\lambda )$ of a radioactive substance are related as

  • A

    $\lambda T = 1$

  • B

    $\lambda T = 0.693$

  • C

    $\frac{T}{\lambda } = 0.693$

  • D

    $\frac{\lambda }{T} = 0.693$

Similar Questions

In a $RA$ element the fraction of initiated amount remaining after its mean life time is 

Curie is a unit of

  • [AIPMT 1989]

Carbon $ - 14$ decays with half-life of about $5,800\, years$. In a sample of bone, the ratio of carbon $ - 14$ to carbon $ - 12$ is found to be $\frac{1}{4}$ of what it is in free air. This bone may belong to a period about $x$ centuries ago, where $x$ is nearest to

Half-life of a radioactive substance is $20\,minute$ . The time between $20\%$ and $80\%$ decay will be ......... $min$

  • [AIIMS 1999]

Explain the $\alpha -$ decay process and give its appropriate example