| Obiettivo:
L'obiettivo di questo esperimento č analizzare l'impulso sonoro che si genera battendo, per esempio con un dito, un tubo di cartone. Cosa accade? quali sono le sue caratteristiche?
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Heinrich Hertz (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. |
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