A radioactive nucleus A with a half life T, decays into nucleus B. At t=0, there is no nucleus B. At somewhat t, the ratio of the number of B to that of A is 0.3 . Then, t is given by

A radioactive nucleus A with a half life T, decays into nucleus B. At t=0, there is no nucleus B. At some time t, the ratio of the number of B to that of A is 0.3 . Then, t is given by

A radioactive nucleus A with a half-life T, decays into a nucleus B. At t=0, there is no nucleus B. At sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by - (A) t=T/2 (log2)/(log1.3) (B) t=T (log1.3)/(log 2) (C) t=T log (1.3) (D) t=T/(log (1.3))

A radioactive nucleus A with a half life T, decays into a nucleus B. At t = 0, there is no nucleus B. At sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :

A sample of a radioactive nucleus A disintegrates to another radioactive nucleus B, which in turn disintegrates to some other stable nucleus C. Plot of a graph showing the variation of number of atoms of nucleus B vesus time is : (Assume that at t = 0, there are no B atoms in the sample)

At t=0 we begin to observe two identical radioactive nuclei with a half life of 5 min. At t=1 min one of the nuclei decays. Does that event increase or decrease the chance of the second nucleus decaying in the next 4 min. or is there no effect on the second nucleus?

A radioactive nucleus can decay in two different processes with half life 0.7 hr and 0.3 hr . The

A radioactive nucleus A has a single decay mode with half life tau_(A) . Another radioactive nucleus B has two decay modes 1 and 2. If decay mode 2 were absent, the half life of B would have been tau_(A)//2 . If decay mode 1 were absent, the half life of B would have been 3 tau_(A) , then the ratio tau_(B)//tau_(A) is–

Nuclei of a radioactive element X are being produced at a constant rate K and this element decays to a stable nucleus Y with a decay constant lambda and half-life T_(1//3) . At the time t=0 , there are N_(0) nuclei of the element X. The number N_(Y) of nuclei of Y at time t is .