Nuclei - Result Question 74
75. Two radioactive materials and have decay constants and respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of to that of will be after a time
[2008]
(a)
(b)
(c)
(d)
Show Answer
Answer:
Correct Answer: 75. (c)
Solution:
- (c) Let the required time be t. Then
Where
Now,