Physics(light)Howtodrawraydiagra
How to draw ray gram of reflection of light? (Might answer in chinese,thank you.)
入射光线AO．入射点O：入射光线与反射面的交点。反射光线OB。法线：过O点作反射面的垂线ON。入射角∠i：入射光线与法线的夹角。反射角∠r：入射光线与法线的夹角。当∠i=∠r时，反射光线 就作出来了