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Ray (geometry)
Three lines — the red and blue lines have same slope, while the red and green ones have same y-intercept.
Ray Differentials and Multiresolution Geometry Caching
EUROGRAPHICS 2003/P. Brunet and D. Fellner (Guest Editors) Volume 22 ( 2003 ), Number 3 Ray Differentials and Multiresolution Geometry Caching for Distribution Ray Tracing in ...
Amazon.com: Geometry: Ray C. Jurgensen, Richard G. Brown, John W ...
Amazon.com: Geometry: Ray C. Jurgensen, Richard G. Brown, John W. Jurgensen: Books ... Save $5 off $25, $10 off $50, or $15 off $100 when you pay with Bill Me Later

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Ray (geometry)

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Ray (geometry), portion of a line limited at one end by a point but extending to infinity in the other direction. A laser beam is similar to a ray: It has a definite beginning point (the laser) but no endpoint (the light continues forever unless something gets in the way). Rays are often designated according to their endpoints and a point through which they pass; a ray with endpoint A that passes through point B may be denoted .