Many unstable nuclei can decay spontaneously to a nucleus of lower mass but different combination of nucleons. The process of spontaneous emission of radiation is called Radioactivity. Decay rate is actually exponentially decrease with time. Radioactive decay is a statically process. Radioactivity is independent of all external condition.
(i) If T H is the half life and T M is the mean life, which of the following statements is correct-
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