“透镜及其应用”在中招考试中属于光学内容的一部分,主要包括透镜对光线的折射规律、凸透镜成像规律、透镜成像的应用等内容.本部分考查的知识点主要有:熟悉凸透镜、凹透镜对光线的折射规律(主要是三条光线,一是通过光心的光线,二是平行于主光轴的光线,三是从焦点射向透镜的光线),能够根据给出的光线和透镜正确作图;对于凸透镜的成像规律,要准确把握成缩小实像、放大实像、虚像时物距和像距的范围,会根据给出的情景判断是哪一种成像情 “Lens and its application ” part of the optical content in the examination, including the refractive law of the lens of the light, the imaging rules of convex lens, the application of lens imaging, etc. The main points of knowledge in this section are: familiar with the lens , Concave lens refraction rules of light (mainly three rays, one through the optical center of the light, the second is parallel to the main optical axis of light, the third is from the focus of the lens to the light), according to the given light and lens Correct mapping; for the imaging law of the convex lens, to accurately grasp to reduce the real image, enlarge the real image, virtual image when the object distance and image distance range, according to the given scenario to determine what kind of imaging