1.

If T is the half-life of a radioactive material, then the fraction that would remain after a time \[\frac{T}{2}\] is      [MP PMT 1992]

A.            \[\frac{1}{2}\]                      
B.            \[\frac{3}{4}\]
C.            \[\frac{1}{\sqrt{2}}\]        
D.            \[\frac{\sqrt{2}-1}{\sqrt{2}}\]
Answer» D.            \[\frac{\sqrt{2}-1}{\sqrt{2}}\]


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