No sound through vacuum.
PIRA: Unknown
No sound through vacuum.
A doorbell and a flashlight bulb are placed under a bell jar which can be pumped down to a reasonable vacuum while the bell is ringing. As the pumping proceeds, the sound vanishes but the bulb is still lighted.
Equipment | Storage |
---|---|
Bell jar | 021-10B |
vacuum pump | 017-3E |
Unfortunately, there are no media for this demo. :(
Video: Ringing bell produces no sound in a vacuum