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Question: The half-life of a radioactive material is T. After T/2 time, the material left is-...

The half-life of a radioactive material is T. After T/2 time, the material left is-

A

12\frac{1}{2}

B

34\frac{3}{4}

C

12\frac{1}{\sqrt{2}}

D

14\frac{1}{4}

Answer

12\frac{1}{\sqrt{2}}

Explanation

Solution

N = N0 2–t/T

= = 12\frac { 1 } { \sqrt { 2 } }