If the function $\sin ^2 \omega t$ ( $t$ is time in second) represents a periodic motion, then the period of the motion is

• A

  $\sqrt{\frac{\pi}{\omega}} \mathrm{s}$
• Correct answer
  B

  $\frac{\pi}{\omega} \mathrm{s}$
• C

  $\frac{2 \pi}{\omega} \mathrm{~s}$
• D

  $\sqrt{\frac{2 \pi}{\omega}} \mathrm{~s}$

Hence, the correct answer is option: 'B'.