OP41 show that sound transmission requires a medium
- Set up the apparatus as it is in the diagram
- Suspend/ hold the alarm clock off the base
- Turn on the Alarm
- Pump out the Air
- Listen carefully
Results / Observations
Set up the apparatus as it is in the diagram, if it is possible to suspend the alarm clock off the base that would be good.
Before you turn on the pump have the alarm clock set to go off, you can hear it only a little more muffled than when it is out in the open.
Turn on the pump, listen to the sound of the alarm now.
If you like you can use a noise meter, and write down the value every 15 seconds.