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Em 10/01/2016 23:59, Matthew Sweeney escreveu:
And here is another interesting video, I'm not even sure how I got the
camera into this mode but it captures the discharges really nice. This is
approx 28 inch discharges to a 3/4 inch grounded brass electrode.
https://youtu.be/SWgHnTDrRr8
This has really good images. It's easy to stop the video on a spark,
that lasts for a single frame, and enhance the photo to see some extra
detail. The terminal is really negative, and these are complete sparks,
with not enough charge for a complete bright channel, that at the
central part becomes diffuse. It's curious to see that at the negative
end, the terminal, there is a straight segment followed by a "plume",
that usually appears at the positive side. Maybe this happens because
the spark oscillates, reverting direction several times.