Opposites attract!

Challenge #10 in the Art Photography series. Hosted by MrScorpio.
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Show opposites in a photo. It can be any kind of opposites as long as they are obvious. To avoid DQ it could be a good idea to describe in text what the opposites are if any doubt.
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Bubble Orb
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There's the obvious opposite of Black and White, but there's also the opposite of straight and curved lines.
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Submitted: Thursday, 21st July, 2011 01:47 (GMT)
Taken: Saturday, 18th June, 2011
Focal length: 55 mm
Shutter speed: 1 sec
Aperture: F20
ISO: 400
Notes: Glass orb with bubbles inside sitting on top of a piece of posterboard on which I painted black stripes. Taken w/ a 1 second exposure and with the aid of a flash from above. Admittedly heavy Post Processing.
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