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| 1. |
Explain with a neat diagram to prove the following sound needs material medium for propagation |
| Answer» JECT REQUIRED____________________ GLASS JARELECTRONIC BELLVACCUM PUMPSWITHCHTHEN,______PROCEDURE_____________________AN ELECTRIC BELL IS TAKEN INSIDE AN AIRTIGHT GLASS JAR.IT IS SUSPENDED INSDE THE GLASS JAR.THE JAR IS CONNECTED TO A VACCUM PUMP.THE SWITCH IS ON AND AIR IS STARTED TO BE PUMPED OUT.THEN,_______OBSERVATION_______________________AT FIRST WE CAN HEAR THE RINGING SOUND OF BELL CLEARY. AS SOON AIR IS PUMPED OUT, THE SOUND OF THE BELL STARTS TO BECOME FEEBLE. AFTER THE AIR IS COMPLETELY VACATED OUT, NO SOUND IS HEARD.____________AFTER THIS EXPERIMENT THE CONCLUSION COMES, AS VACCUM IS CREATED IN THE JAR, NO SOUND IS HEARD. THIS MEANS SOUND ALWAYS NEEDS A MEDIUM TO TRAVEL.___________ | |