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一、考点点击本章知识点包括光的直线传播、光速、光的反射定律、平面镜成像的特点、平面镜对光线的控制作用、虚像的概念等,重点考查用光的直线传播规律解释简单的物理现象和以反射定律为核心的“三线共面”、“法线两侧”、“反入角度”、“光路可逆”等方面的知识.还须注意对平面镜成像的特点和平面镜对光的控制作用等知识点进行考查,中考题常以填空题、选择题、作图题等题型出现.
First, the test site click on this chapter knowledge points including light linear propagation, the speed of light, the law of light reflection, the characteristics of plane mirror imaging, plane mirror on the role of light control, the concept of virtual image, focusing on the use of light to explore the law of straight line to explain the simple physical phenomenon With the knowledge of the “three-line coplanarity”, “normal line sides”, “back-in angle”, and “optical path reversibility” with reflection law as the core, attention must be paid to the characteristics of plane mirror imaging and the control effect of plane mirrors on light. And other knowledge points to examine, the exam questions often fill in the blank, multiple choice questions, drawing questions and other questions appear.