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手术室内的顶灯被称作“无影灯”,那么它真的是无影的吗?其功能又怎样?这要从光和影的关系谈起。由于光的直线传播,当光照射到不透明的物体上时,在物体的后面就会形成影子。影子在不同的地
The ceiling light in the operating room is called the “smearless lamp”. So is it really shadowless? What is its function? It starts with the relationship between light and shadow. Due to the linear propagation of light, when light strikes an opaque object, a shadow is formed behind the object. Shadows in different places