Question
Question: A freshly prepared radioactive source of half life 2 h emits radiation of intensity which is 64 time...
A freshly prepared radioactive source of half life 2 h emits radiation of intensity which is 64 times the permissible sage level. The minimum time after which it would be possible to work safely with this source is.
A
128 h
B
24 h
C
6 h
D
12 h
Answer
12 h
Explanation
Solution
: 12 h