to make diagrams simpler we only show ray of light from the top and bottom of objects
{"Image DocumentName": "To make diagrams simpler we only show one ray of light from the top and bottom of objects.", "Image ImageDescription": "Rays illuminating Non-Luminous objects are not shown..", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}