Atoms And Nuclei Question 356

Question: Two radioactive materials A and B have decay constant 137 units and 1914 units respectively. Directly both have the same number of nuclei. The time (in same system of units), after which the ratio of their remaining nuclei will be 1/e is

Options:

A) 2

B) 3

C) 4

D) 5

Show Answer

Answer:

Correct Answer: A

Solution:

  • N1N2=e(λ2λ1)=1e
    t=1λ2λ1=2


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