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光的反射和光的折射两章中的知识结构即有相似之处,又有所不同,但都涉及到有关“线、角、像”等问题。同学们在学习时应抓住这根主线。一、分清线光现象中的“线”,应重点分清反射光线和折射光线,实线和虚线。1、入射光线与折射光线:入射光线和反射光线、入射光线和折射光线都分居法线两侧。对于反射与折射现象的判断,关键是看光线是回原介质,还是进入另一种介质或进入同种不均匀介质,若返回原介质则为反射光线,若进入另一种介质或进人同种不均匀介质,则可能为折射光线。
The reflection of light and the refraction of light have similarities and differences in the knowledge structure in the two chapters, but they all involve issues concerning “line, angle, and image”. Students should seize this main line while studying. First, distinguish the “line” in the phenomenon of clear line light, should focus on distinguish between reflected light and refracted light, solid line and dotted line. 1. Incident rays and refracted rays: Incident rays and reflected rays, incident rays and refracted rays are separated on both sides of the normal line. For the judgment of the reflection and refraction phenomenon, the key is to see whether the light is back to the original medium, or enter another medium or enter the same kind of heterogeneous medium. If it is returned to the original medium, it is reflected light, if it enters another medium or enters the same person Inhomogeneous media, it may be refracted light.