Photoelasticity Fun
Aug 5, 2018 07:28:28 #
Just discovered this technique and am having fun with it. All you need is something clear plastic (they do not all work equally), a computer/laptop/tablet screen, and your camera with a polarizer. Tried it for the first time last night. Pretty cool!
Aug 5, 2018 07:29:04 #
Aug 5, 2018 07:32:13 #
Aug 5, 2018 07:34:48 #
Aug 5, 2018 11:12:00 #
Some are born with a silver spoon in da mouth .., it looks like it would be more fun if it were clear plastic ...cool shot and new techniques make this an interesting ...shot ...
Aug 6, 2018 09:29:37 #
Aug 6, 2018 09:49:57 #
Aug 6, 2018 12:05:55 #
aschweik wrote:
Just discovered this technique and am having fun with it. All you need is something clear plastic (they do not all work equally), a computer/laptop/tablet screen, and your camera with a polarizer. Tried it for the first time last night. Pretty cool!
This also works with glass. Look at the side or back windows in a car.
This phenomenon is called birefringence and is used to observe stresses in glass, plastic and some other materials. Most plastics are 10 times more reactive than glass which allows you to make a neat experiment. Take your spoon and bend it and watch the colors change as the stresses change. Take a piece of plastic that has no stresses and bend it and you can see how you can develop temporary stresses in it.
The cellophane wrapper on a pack of cigarettes also shows the colors but it that case it is not due to stresses.
Sep 19, 2018 12:03:31 #
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