Write an activity to prove that sound needs a medium for propogation .
I searched it on the study material but realistic activities are needed inculing
1) Aim
2) Materials Required
3) Procedure
4) Observation / Conclusion
Thanks in adance and don't forget to wish me 'All The Best' for the exam . Tomorrow it will take place .
AIM
TO PROVE THAT SOUND NEEDS A MEDIUM FOR PROPOGATION .
MATERIALS REQUIRED
ELECTROMAGNETIC BELL , VACCUM PUMP , GLASS JAR .
PROCEDURE
1 ) ON THE ELECTROMAGNETIC BELL .
2 ) MAKE SURE IT IS IN AN HORIZANTAL PLANE .
3 ) COVER IT WITH A GLASS JAR .
4 ) WITH THE HELP OF A VACCUM PUMP , SUCK OUT THE AIR COVERING THE ELECTROMAGNETIC BELL INSIDE THE JAR
OBSERVETION
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 PROPOGATION .
ALL THE BEST !!!!!!!!!!!!!!!!!!!!!!!!