School of Physics Lecture Demonstration Manual

Ei-3 Hertz's Apparatus

Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011


To demonstrate Hertz's apparatus (a full scale model of the original device used for the production and transmission of electromagnetic waves).



Click on pictures to enlarge.

Hertz's Apparatus Diagram


The induction coil is connected to Hertz's apparatus which consists of a pair of large square plates separated by a spark gap. The approximate values for L and C in this arrangement yields a resonant frequency of ~ 55MHz lambda=5.4 metres.

The production of electromagnetic waves is demonstrated by the lighting of a fluorescent tube.

Safety notes

Electrical safety 

Sharps safety 


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