Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t = 0 it was 1600 counts per second and t = 8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t = 6 seconds is close to -
Show Hint
- 200
- 150
- 400
- 360
The Correct Option is A
Solution and Explanation
At \(t=6\) s, \(n = \frac{6}{2} = 3\) half-lives have passed.
Rate \(= \frac{1600}{2^3} = 200\) counts per second.
Answer: (1) 200
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