Obtain the relation between the decay constant and half life of a radioactive sample.
The number of atoms at any instant in a radioactive sample is given by
N=total number of atoms at any instant
N0=number of atoms in radioactive substance at t=0
When t=T (Where T is the half life of the sample)
Taking log on both the sides, we get
`lambdaT=log_e2=2.303 lod_10 2`
`=>T=(2.303 lod_10 2)/lambda`
`=>T=(2.303 xx 0.3010)/lambda`
Thus, half life of a radioactive substance is inversely propotional to decay constant.
Video Tutorials For All Subjects
- Law of Radioactive Decay