We know that light reflection phenomenon happens to the surfaces. When the object surface is bright and clean level of the ideal, the reflection of light completely conforms to the law of reflection, the reflected light and the Angle on the surface of the object is equal to the incident light and the Angle on the surface of the object. The rules of physics called reflection and mirror reflection. If the surface is very rough, to the object light reflection across the whole space of all directions, it is called diffuse in physics. If diffuse light evenly distributed in all directions, the brightness of all directions are equal, this is called isotropic diffusion. In fact there is no ideals of mirror reflection and diffuse reflection. Most of the time between mirror reflection and diffuse reflection, in some cases may be more of a mirror reflection, in some cases may diffuse component, this kind of situation is called hybrid reflection. YanZhiXiang
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