Use a resonance apparatus as a physics laboratory equipment to demonstrate resonance in sound waves.

It typically consists of a resonance tube partially filled with water, connected to a tuning fork or sound source.

When a vibrating tuning fork is held above the tube, air inside the tube vibrates.

At a certain length of air column, resonance occurs, the natural frequency of the air column matches the frequency of the tuning fork.

This produces a loud sound due to maximum vibration of air molecules

By adjusting the length of the air column, students can:

Observe resonance conditions
Measure the speed of sound in air
Understand the concept of natural frequency and resonance
It helps illustrate how sound waves reinforce each other when frequencies match to produce the due to the auditory effect of resonance.