Sometimes, the Microsoft Outlook integration is successful but you might not see the users' presence status/presence bubble in Microsoft Outlook. In order to troubleshoot this problem, verify these points:
2. Half-life is the time taken for the count rate to fall to half of its original reading. There are a number of ways to define half-life. Remember one of the above definitions, it may be useful in the exams. An Explanation of Half-life. A radioactive material will have some nuclei that are stable and some that are unstable.
For other uses, see Half-Life (disambiguation). Half-life (abbreviated t1â2) is the time required for a quantity to reduce to half its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo, or how long stable atoms survive, radioactive decay.