Light bulb and buzzer in vacuum jar. Light travels through vacuum but sound does not.
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.
This teaching resource was developed with support from