檢視法线的原始碼

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|<center>'''法线'''<br><img
src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimage.imufu.cn%2Fforum%2Fmonth_0805%2F20080519_293fa9faea62f1cb2eb1CICGhUta4vKt.png&refer=http%3A%2F%2Fimage.imufu.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1655023821&t=eed755759f197924f5f32a31c9eb32bb " width="280"></center><small>  圖片來自百度</small> 
|}
'''法线''' （始终垂直于某平面的虚线)（normal line），是指始终垂直于某平面的直线。在[[几何学]]中，[[法线]]指平面上垂直于曲线在某点的切线的一条线。法线也应用于光学的[[平面镜反射]]上。

*中文名:[[法线]]

*外文名:normal line

*概    念:垂直于某平面的直线（几何学），过入射点垂直于镜面的直线（光学）

*领    域:[[数学]]、[[物理]]