射线





Disambig gray.svg  本文介紹的是物理現象。關於DC漫画的虚拟人物，請見「射線 (漫畫)」。


射線（ray）是一束細小的流動粒子束或能量，如光線、X射線、α射線、β射線。[1]




目录






  • 1 幾何學


  • 2 光學


  • 3 注释


  • 4 外部链接





幾何學


在歐幾里得幾何中，直线上的一点和它一旁的部分所组成的图形称为射线或半直線。



光學


在幾何光學中，射線是描述光線或其他電磁輻射傳播的方向的一條曲線。這種射線和物理光學的波前垂直。


在大部分的簡單情況，在給定的傳導體內的光射線是直線。光線經過一個傳導體到另一個傳導體，其路徑符合司乃耳定律的折射或全內部反射。



注释





  1. ^ http://www.oup.com/oald-bin/web_getald7index1a.pl?nav=on&which_entry=030436%23x1%23x1%23ray&selected_word=ray&search_word=ray




外部链接






维基共享资源中相关的多媒体资源：射线



  • Hazewinkel, Michiel (编), Line (curve), 数学百科全书, Springer, 2001, ISBN 978-1-55608-010-4 

  • 埃里克·韦斯坦因. Line. MathWorld. 


  • Equations of the Straight Line at Cut-the-Knot




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