A radioactive source has a half-life of 
. A freshly prepared sample of the same exhibits radioactivity 32 times the permissible safe value. The minimum time after which it would be possible to work safely with the source is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Given, half-life of radioactive source 
. And exhibit radioactivity 32 times the permissible safe value
Hence, sample becomes safe in 5 half-lives.
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