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在每年的中考试题中,作图题必不可少,作图题是反映学生对知识理解和掌握程度的一类题型。在光学部分,对光的反射和平面镜成像的考查是中考的重点,特别是根据光的反射定律、平面镜成像特点、光的折射规律和凸透镜成像规律等知识设计的作图题。作图时,解答要求准确、规范,然而学生在作图时,常常会有虚实线不分,把光的传播方向标反等问题,都会导致学生失分严重。一、法线是桥梁在光的反射和折射现象中,中考试题中
In the annual mid-term exam questions, drawing questions is essential, drawing questions is to reflect the students understanding and mastery of knowledge a type of questions. In the optical part, the reflection of light and the imaging of the plane mirror are the key points of the senior high school entrance examination, especially based on the light reflection law, the imaging characteristics of the plane mirror, the refraction law of the light and the imaging rules of the convex lens. When drawing, the answer to the request is accurate and standard, however, when students are drawing, they often have a virtual reality line regardless of the direction of light propagation and other issues, will lead to serious loss of students. First, the normal is the bridge in the light reflection and refraction phenomena, the exam questions