The objective of this experiment is to explore the sound pulse that
appears when a cardboard tube is struck with an object for example your
index finger. What are the characteristics of the sound pulse that
(1847 - 1894), a German physicist, applied Maxwell's theories
to the production and reception of radio waves. The unit of
frequency of a radio wave - one cycle per second - is named
the hertz, in honour of Heinrich Hertz. Hertz proved the
existence of radio waves in the late 1880s. He used two rods
to serve as a receiver and a spark gap as the receiving
antennae. Where the waves were picked up, a spark would jump.
Hertz showed in his experiments that these signals possessed
all of the properties of electromagnetic waves.