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• 09:56, 25 April 2022 Physdemo talk contribs created page Lucite Block and Laser (Created page with "{{NewDemo|subject=Light and Optics|topic=Geometrical Optics|file1=Laser&Lucite_Block.gif}} A semi-circular piece of lucite is mounted on a white board. Laser light going through a cylindrical lens reflects off the board and also goes through the lens. Angles of reflection and refraction can be observed, as well as total internal reflection. A white light line source, such as an old slide projector with a slit slide, can also be used as a light source. Approaching total...")