How can you show that sound cannot travel through a vacuum? Draw a labelled diagram of the apparatus used.
How can you show that sound cannot travel through a vacuum? Draw a labelled diagram of the apparatus used.
The Bell-Jar Experiment -->
Objective :
To show sound can't propagate through the vacuum
Apparatus Required :
1) A glass jar
2) Electronic Bell
3) Vacuum pump
4) Switch (electric connection)
Procedure :
1) An electric bell is taken inside an airtight glass jar.
2) It is suspended inside the jar.
3) The jar is connected to a vacuum pump.
4) The switch is on and the air is started to be pumped out.
Observations :
1) At first, we can hear the sound of the bell clearly.
2) As soon as air is pumped out, the sound of bell starts to become feeble
3) After the air is completely vacated out, no sound is heard.
Conclusion :
This means as a vacuum is created in the jar, no sound is heard. This means sound always requires a material medium to travel.
The Bell-Jar Experiment -->
Objective :
To show sound can't propagate through the vacuum
Apparatus Required :
1) A glass jar
2) Electronic Bell
3) Vacuum pump
4) Switch (electric connection)
Procedure :
1) An electric bell is taken inside an airtight glass jar.
2) It is suspended inside the jar.
3) The jar is connected to a vacuum pump.
4) The switch is on and the air is started to be pumped out.
Observations :
1) At first, we can hear the sound of the bell clearly.
2) As soon as air is pumped out, the sound of bell starts to become feeble
3) After the air is completely vacated out, no sound is heard.
Conclusion :
This means as a vacuum is created in the jar, no sound is heard. This means sound always requires a material medium to travel.
