Question

describe an experiment with a neat and labelled diagram To show that sound cannot travel through vacuum

Answer 1

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 AND IT CANNOT TRAVEL IN VACCUM

HOPE HELPED.

Answer 2

keep a cell phone in a bell jar. dial the number of the phone so that it starts ringing. pump out the air from the bell jar by means of a vacuum pmp.

as more and more air is removed from the jar, the sound is less heard and finally is heard very faintly.

• from this activity we can conclude that sound cannot travel through vacuum, but can travel through air