Practicing Success
Practicing Success
CUET Preparation Today
A radioactive source is freshly prepared. It is found that it emits radiation of intensity which is 128 times the premissible safe level. The half life of this sample is 3 hours. Find the minimum time after which it would be possible to work safely with this radioactive source. |
12 h 21 h 24 h 48 h |
21 h |
The correct answer is Option (2) - 21 h |
