Question

Rapid to and fro motion of a medium particle about its mean position is ? A) vibration B) Oscillation C) displacement D) frequency​

Answer 1

Answer:

a) vibration

Explanation:

Rapid to and fro motion of medium particle about it means position is vibration

Answer 2

$vibrational \: motion$

To and fro motion of a particle about mean position is called vibrational motion.