PDF chapter test TRY NOW
Take 6-8 metal bowls or tumblers. Fill them with water up to different levels, increasing gradually from one end to the other. Now take a pencil and strike the bowls gently. Strike all of them in succession. You will hear a pleasant sound. This is your Jaltrang.
![YCUZD_230308_5070_sound_CBSE8_6.png](https://resources.cdn.yaclass.in/c74f2811-ed2b-4e25-8877-0a66796eea6f/YCUZD2303085070soundCBSE86w300.png)
When we strike the bowls with pencil gently, the water in the bowls is are produced. These vibrations travel through water and the surroundings like air to create . The frequency or pitch of the sound on the water level in the bowl.
When we strike all the bowls in succession, is audible. This is a result of the water levels in the bowls varying.
So, we discover that the shorter the vibrating air column's length, the its pitch.
Important!
This is an activity-based exercise. Do the activity and answer questions.