Wikipedia:Featured picture candidates/Corona discharge

Corona discharge

Voting period is over. Please don't add any new votes. Voting period ends on 12 Aug 2013 at 02:15:56 (UTC)

Original – Corona discharge on corona ring of 500 kV overhead power line. A corona discharge is an electrical discharge brought on by the ionization of a fluid surrounding a conductor that is electrically energized. The discharge will occur when the strength (potential gradient) of the electric field around the conductor is high enough to form a conductive region, but not high enough to cause electrical breakdown or arcing to nearby objects.

Reason

High quality and high EV

Articles in which this image appears

Corona discharge, Corona ring

FP category for this image

Wikipedia:Featured pictures/Sciences/Others

Creator

Nitromethane

• Support as nominator --Nikhil(talk) 02:15, 2 August 2013 (UTC)
• Comment. This is in desperate need of an explanation to be useful. Was the photo taken in the daylight but with a very short exposure, or was it taken at night? Is the phenomenon visible only at long exposures but not with the naked eye? Was it taken with a some kind of filter, or are the colours and luminosity 'au naturel'? I suspect I know the answers to the questions (they're somewhat rhetorical), but it's a photo that needs explaining in the caption, otherwise we're not really sure what we're looking at. Ðiliff «» (Talk) 08:43, 6 August 2013 (UTC)
  • IMHO, the picture was taken during the night to have more visual impact than the picture taken during a day as the discharge around the conductor has such brilliance that can be quite spectacular during the night. And the phenomenon is visible with the naked eye and I don't think any filter is required to capture this phenomenon.--Nikhil(talk) 05:41, 7 August 2013 (UTC)
• Support Looks good to me. Adam Cuerden ^(talk) 06:39, 11 August 2013 (UTC)

Not Promoted --Armbrust ^{The Homunculus} 07:02, 12 August 2013 (UTC)