Specular vs Diffuse Reflection

Light is central to our experience of the world. Without its reflective properties, our eyes would not work. When we look at an object, the light rays entering our eyes are ones that have reflected off of the object. Our ability to determine the location and distance of the things we see stems from the fact that light rays behave in predictable ways.
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Light reflection and refraction

Light is a complex phenomena. It exhibits both wave-like and particle-like properties and its exact nature is not completely understood. This complexity makes it difficult for one model to describe all of light’s properties. As a result, different models are used to describe different aspects of light’s behavior. The electromagnetic wave theory explains light’s ability to travel through a vacuum. The light ray model, on the other hand, can describe interactions between light and matter.
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