Question

Explain the experiment, with neat diagram, to prove the following:
‘Sound needs material medium for propagation.’

Answer 1

HEYA..

FOR THIS WE CAN DO A BELL JAR EXPERIMENT..

KEEP THE BELL IN A JAR ANDCONNECT IT WITH BATTERY.

AFTER THAT CLOSE IT SO THAT AIR CANNOT GO IN IT..

THEN CATTACH A VACCUM IN IT TO RELEASE OUT AIR.

NOW RING THE BELL.

U WILL HEAR SOME SOUND..THEN START VACCUM AND RELEASE OUT SOME AIR.

THIS TIME U WILL LISTEN LESS SOUND AS COMPARED BEFORE..

THEN AGAIN REMOVE OUT SOME AIR..U WILL OBSERVE THAT AS THE AIR IS REMOVED THE INTENSITY OF SOUND BECOMES VERY LOW

AND SITUATION WILL COME WHERE NO AIR WILL BE LEFT IN THE JAR AND WHEN U WILL RING THEBELL ...NO SOUND WILL BE HEARD

THIS SHOWS THAT SOUND NEEDS A MEDIUM TO PROPAGATE

HOPE HELPED.

Answer 2

Explanation:

The experiment is done by placing an electrical bell in the bell jar. As the air is pumped out of the sealed bell jar, the sound from the bell jar fades. ... This demonstrates that the sound wave cannot travel through vacuum. That is, a sound wave needs a material medium for its propagation.