To determine the half life of a radioactive element, a student plots a graph of 
versus t. Here 
is the rate of radioactive decay at time t. If the number of radioactive nuclei of this element decreases by a factor of p after 4.16 years, the value of p is :
Text Solution
Verified by ExpertsThe correct answer is:
A
According to radioactive decay law,
Taking 
both sides,
This is a straight line equation with slope 
From the given graph,
Let the number of half life 
So, 
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