Description:  These frames show a strip of plastic stretched, curling as one side is exposed to ultraviolet light, and slowly recovering its original shape as it is exposed to shorter-wavelength ultraviolet light.
Source:  GKSS Research Center
Story:  Ultraviolet shifts plastic's shape
TRN April 20/27, 2005
TRN Categories:  Materials Science and Engineering
Form:  Still

 
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