${\alpha=\omega^{2} A} ......... (i)$
${\text { and } \beta=\omega A} ......... (ii)$
Dividing eqn. $(i)$ by eqn. $(ii),$ we get
$\frac{\alpha}{\beta}=\frac{\omega^{2} A}{\omega A}=\omega$
$\therefore$ Time period of vibration is
$T=\frac{2 \pi}{\omega}=\frac{2 \pi}{(\alpha / \beta)}=\frac{2 \pi \beta}{\alpha}$


