Abstract
Light bulb and buzzer in vacuum jar. Light travels through vacuum but sound does not.
Principles Illustrated
Light will travel through a vacuum but sound will not.
NCEA & Science Curriculum
JNR SCI
Instructions
Turn on the light bulb and the buzzer connected in series. Turn on the pump. After a few minutes the sound will cease but the light will not.
Safety
Be SURE to use a chamber that can sustain a vacuum.
Individual teachers are responsible for safety in their own classes. Even familiar demonstrations should be practised and safety-checked by individual teachers before they are used in a classroom.
References
PIRA 3B30.30
Credits
This teaching resource was developed with support from
The MacDiarmid Institute
Faculty of Science, Victoria University of Wellington
School of Chemical and Physical Sciences, Victoria University of Wellington