我的名字叫“影子”，我的存在离不开光和挡光物体及显影屏幕，同时还得利于光在同一种均匀介质中沿直线传播．当光照射到人或其他物体上时，人或物在光的传播方向上形成障碍，一部分光被物体的不透明部分挡住，光照不到的地方，就显得比周围光照到的地方暗，于是就形成厂‘影 My name is “Shadow.” My existence is inseparable from the light and light-blocking objects and the development screen. At the same time, it is also conducive to the light propagation along a straight line in the same homogeneous medium. When light strikes a person or other object, the person or object forms an obstacle in the direction of light propagation. A part of the light is blocked by the opaque part of the object. Where the light does not shine, it becomes darker than the place where the surrounding light shines. Thus, Forming factory