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.
Instead, the half-life is defined in terms of probability: Half-life is the time required for exactly half of the entities to decay on average. In other words, the probability of a radioactive atom decaying within its half-life is 50%.