Drag the light beam into and out of the fiber optic. Change the angle of the beam.
<script language="JavaScript"> function fiber(){ document.Optics.setDefault();; document.Optics.addIndexChange(1.0,1.4); document.Optics.addIndexChange(2.0,-1.4); document.Optics.setDirection(1); document.Optics.setPropertyDrag(true); document.Optics.setDrag(true); document.Optics.setRayRGB(255,255,255); document.Optics.addISource(1.5,-0.5,100,-1.0); } </script>