Sound and Light in a Vacuum


Sound and Light in a Vacuum Apparatus
Sound and Light in a Vacuum Apparatus

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



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.


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.


PIRA 3B30.30


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


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