反射 花边镜子 镜面对于光线的反射服从反射定律，其反射能力取决于入射光线的角度、镜面的光滑度和所镀金属膜的性质。与镜面垂直的假想线称为法线，入射线与法线的夹角和反射线与法线的夹角相等。平面镜前的物体在镜后成正立的虚像，像与镜面的距离与物体与镜面的距离相等。如果想从镜中看到本人整个身长，由于入射角等于反射角，镜子至少须有本人身长的一半。凹面镜的反射面朝向曲率中心。 聚焦 花边镜子 平行光线入射到凹面镜反射后聚集到焦点（f），焦点位置在曲率中心（c）与镜面距离的1/2处。如烹饪器放在大凹面镜焦点位置，可接受太阳光聚集加热，成为太阳灶。如车灯或探照灯中光源放在凹面镜焦点位置可使光反射出平行光。物体在曲率中心以外时可反射成倒立的实像，如反射望远镜。凸面镜的反射面背向曲率中心，物体在镜后成缩小的正立像，可以反射大范围的缩小景观，如汽车后视镜 The reflection of the mirror mirrors to the mirror of the mirror obeys the law of reflection, which depends on the angle of the incident light, the smoothness of the mirror, and the properties of the metal film plated. The hypothetical line perpendicular to the mirror is called the normal line. The angle between the incoming rays and the normal is equal to the angle between the ray and the normal line. The object in front of a plane mirror becomes a positive virtual image after the mirror, and the distance between the image and the mirror is equal to the distance between the object and the mirror. If I want to see my whole body from the mirror, because the angle of incidence is equal to the reflection angle, the mirror must have at least half of my body length. The reflection face of the concave mirror faces the center of curvature. Focus the lace mirror parallel light incident to the concave mirror reflection and then gather to focus (f). The focus is located at the 1/2 of the distance between the curvature center (c) and the mirror. If the cooker is placed in the focus of the concave mirror, it can be heated by the sunlight and become a solar cooker. If the light source in the headlight or searchlight is placed in the focal position of the concave mirror, the light can be reflected parallel light. Objects outside the center of curvature can be reflected into inverted images, such as reflecting telescopes. The center of the curvature of the reflector of the convex mirror. The object is reduced to the upright image after the mirror. It can reflect a wide range of landscape, such as the automobile rearview mirror.