1.

In a successive radioactive disintegration underset(N_(1))(A)overset(lamda_(1))tounderset(N_(2))(B)overset(lamda_(2))toC …. No. of nuclides after time t. in which the parent has a longer but not much longer half-life than the daughter. Which of the following expressions is correct?

Answer»

`(N_(1))/(N_(2))=lamda_(2)/lamda_(1)`
`(N_(1))/(N_(2))=(lamda_(2)-lamda_(1))/lamda_(1)`
`N_(1)/N_(2)=lamda_(1)/lamda_(2)`
`N_(1)/N_(2)=(lamda_(2)-lamda_(1))/lamda_(2)`

Answer :B


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