Tesla discharge through boys body

Autor:

Harry La Verne Twining

Credit:

Downloaded from Harry La Verne Twining (July 1, 1909) Wireless Telegraphy and High Frequency Electricity, self published, Los Angeles, USA, p.54, plate 3 on Google Books

Krótki link:

https://plwiki.pl/b/ff13e

źródło:

Wikimedia Commons

Wymiary:

697 x 961 Pixel (183576 Bytes)

Opis:

Time exposure photo of a student conducting a discharge through his body from a Tesla coil, of a type known at the time as an Oudin coil, at Los Angeles Polytechnic High School around 1909. The arcs are 16 inches (41 cm) long, corresponding to a voltage of around 200kV. The subject doesn't feel a shock and is apparently unharmed. It was believed until recently that this was due to skin effect: the high frequency current doesn't penetrate into the body but travels along the skin, so it cannot cause electrocution, only skin burns. The student uses a metal rod to avoid skin burns. However, it is now thought that Tesla coil discharges can travel through the interior of the body, causing damage, and the subject doesn't feel a shock because the nerve cells are not sensitive to these high frequency currents. Therefore THIS EXPERIMENT IS EXTREMELY DANGEROUS AND CAN RESULT IN ELECTROCUTION. DON'T TRY IT. Alterations to image: removed caption, which read: "Taking a 16 inch discharge into the body from the Oudin resonator. Exposed 10 seconds."

Licencja:

Public domain

Komentarz do licencji:

Public domain - published in USA prior to 1923