This is a Tesla coil I filmed at the Griffith Observatory in Los Angeles. Invented by Nikola Tesla, it is defined as “a step-up transformer with an air core; used to produce high voltages at high frequencies.” Source: http://wordnet.princeton.edu/perl/webwn?s=tesla%20coil
For a definition of Tesla coils see: http://www.thefreedictionary.com/Tesla+coil
And yes, I am aware that the credits run longer than the video!
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Article writing is also a fun, if you know afterward you can write otherwise it is complicated to write.