Polysulfone is a polymer that changes its opticaldensity when it is exposed to UVR. The shade of the smiley-face graphic corresponds to that of thepolysulfone after it has been exposed to one MED. When the graphic is no longer visible, the usershould get out of the sun.[ View more Senior Design projects on YouTube ][ View more Senior Design projects in Flickr ] Improved Walker DesignTeam MembersDa