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
2) Materials Required
4) Observation / Conclusion
Thanks in adance and don't forget to wish me 'All The Best' for the exam . Tomorrow it will take place .
TO PROVE THAT SOUND NEEDS A MEDIUM FOR PROPOGATION .
ELECTROMAGNETIC BELL , VACCUM PUMP , GLASS JAR .
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
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 !!!!!!!!!!!!!!!!!!!!!!!!
Aim : To show that sound needs a medium to travel
Material required : Mobile ; Glass ; Pen and Paper
1) Firstly, kept the mobile in the glass.
2) Secondly , tell your friend to send a ring on your mobile.
3) Thirdly , when the ring strats ringing on the mobile in the glass , keep your mouth on the glass and suck the air.
Observation : We find that when we suck the air from the mobile the sound of the ring starts getting feeble and feeble.
Conclusion : By this activity we conclude that the sound needs a medium to travel and it cannot travel in the vaccum.
HOPE GOOD FOR U.ALL THE BEST.