After five half lives what will be the fraction of initial s... | PHYSICS - RADIOACTIVITY | SolveeIt | Solveeit

Today, August 19

Question

After five half lives what will be the fraction of initial substance.

A

$\left( \frac{1}{2} \right)^{10}$

B

$\left( \frac{1}{2} \right)^{5}$

C

$\left( \frac{1}{2} \right)^{4}$

D

$\left( \frac{1}{2} \right)^{3}$

Answer

$\left( \frac{1}{2} \right)^{5}$

Explanation

Solution

$\frac{N}{N_{0}} = \left( \frac{1}{2} \right)^{n} = \left( \frac{1}{2} \right)^{5}$