explain with help of an activity that sound propagation requires a medium
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TO PROVE THAT SOUND NEEDS A MEDIUM FOR PROPAGATION .
MATERIALS REQUIRED
ELECTROMAGNETIC BELL , VACUUM PUMP , GLASS JAR .
PROCEDURE
1 ) ON THE ELECTROMAGNETIC BELL .
2 ) MAKE SURE IT IS IN AN HORIZONTAL PLANE .
3 ) COVER IT WITH A GLASS JAR .
4 ) WITH THE HELP OF A VACUUM PUMP , SUCK OUT THE AIR COVERING THE ELECTROMAGNETIC BELL INSIDE THE JAR
OBSERVATION
AS SLOWLY THE AIR IS SUCKED OUT , THE SOUND OF THE BELL DECREASES . AT ONE POINT OF TIME , WHEN THE AIR IS FULLY SUCKED OUT , WE WILL NOT BE ABLE TO HEAR THE SOUND .
CONCLUSION / RESULT
SOUND NEEDS A MEDIUM FOR PROPAGATION .
ALL THE BEST !!!!!!!!!!!!!!!!!!!!!!!!
MATERIALS REQUIRED
ELECTROMAGNETIC BELL , VACUUM PUMP , GLASS JAR .
PROCEDURE
1 ) ON THE ELECTROMAGNETIC BELL .
2 ) MAKE SURE IT IS IN AN HORIZONTAL PLANE .
3 ) COVER IT WITH A GLASS JAR .
4 ) WITH THE HELP OF A VACUUM PUMP , SUCK OUT THE AIR COVERING THE ELECTROMAGNETIC BELL INSIDE THE JAR
OBSERVATION
AS SLOWLY THE AIR IS SUCKED OUT , THE SOUND OF THE BELL DECREASES . AT ONE POINT OF TIME , WHEN THE AIR IS FULLY SUCKED OUT , WE WILL NOT BE ABLE TO HEAR THE SOUND .
CONCLUSION / RESULT
SOUND NEEDS A MEDIUM FOR PROPAGATION .
ALL THE BEST !!!!!!!!!!!!!!!!!!!!!!!!
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