Experimental Setup for Producing EM Waves
Hertz experiment based on the fact that a oscillating charge is accelerating continuously, it will radiate electromagnetic waves continuously. In Fig. 4,
- The metallic plates (P1 and P2) acts as a capacitor.
- The wires connecting spheres S1 and S2 to the plates provide a low inductance.
- When a high voltage is applied across metallic plates these plates get discharged by sparking across the narrow gap. The spark will give rise to oscillations which in turn send out electromagnetic waves. Frequency of these wave is given by
The succession of sparks send out a train of such waves which are received by the receiver.