3B30.30  BELL IN A VACUUM



  • Version 1
  • The signal from a microphone next to a buzzer inside a vacuum chamber fades as the chamber is evacuated.
  • A video camera may be used to project the oscilloscope display in large classrooms.
  • Wear face shield while chamber is evacuated.




        (inspect bell jar, tell instructor to open valve slowly)
        (set power supply to 3.0 V)


  • Version 2
  • An amplifier and speaker are used in place of the oscilloscope.
  • Wear face shield while chamber is evacuated.





        (inspect bell jar, tell instructor to open valve slowly)
        (set power supply to 3.0 V)

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