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The half-life of a freely prepared radi...

The half-life of a freely prepared radioactive sample is 2 hours . If the sample emits radiation of intensity which is 32 times the permissible safe level, then calculate the minimum time taken after which it would be possible to work safely with source .

A

8 h

B

10 h

C

16 h

D

2 h

Text Solution

Verified by Experts

The correct Answer is:
B
`1/32 = 1 / 2^(x)`
Time to work safely = `5 xx 2`= 10 h
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