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光从一种介质射到它和另一种介质的分界面时,一部分光返回到这种介质中的现象叫光的反射;而斜射向界面的光进入第二种介质中的现象叫光的折射.一、光的反射光的反射遵循反射定律:反射光线、入射光线和法线在同一平面内;反射光线和入射光线分居法线两侧;反射角等于入射角.在反射现象中,光路是可逆的.利用光的反射定律来控制光路和成像的光学元件之一就是平面镜.平面镜只改变光的传播方向,不改变光束的性质,物体通过平面镜可成正立、等大的
When a light strikes an interface between it and another medium, a part of the light returns to the medium is called the reflection of light. The phenomenon that the light obliquely enters the interface enters the second medium is called light Refraction. A reflection of light reflected by the law to follow the law of reflection: reflected light, incident light and normal in the same plane; reflected light and incident light on both sides of the normal separation; reflection angle equal to the incident angle in the reflection phenomenon, the optical path Is reversible.Using the law of reflection of light to control the optical path and imaging is one of the optical elements plane mirror.Plane mirror only changes the direction of light transmission, does not change the nature of the beam, the object through the plane mirror can be erected, such as large