Transcription of 2.1 Reflection
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2.1 Reflection
Fritz Albregtsen 2008 2 Reflection , refraction, diffraction, and scattering In this chapter we will describe how radiation is reflected off a surface, transmitted into a medium at a different angle, how it is influenced by passing an edge or through an aperture, and how it is scattered and spread out by interactions with particles at various scales. We will focus on the propagation of light . In order to describe the direction in which light propagates, it is often convenient to represent a light wave by rays rather than by wave fronts. In fact, rays were used to describe the propagation of light long before its wave nature was established. Geometrically, the duality is easy to handle: Whenever we indicate the direction of propagation of light by a ray, the wave front is always locally perpendicular to the ray. Reflection Figure 2-1.
specular reflection, the angle of incidence θi equals the angle of reflection θr. Figure 2-4. Reflection from a mirror. A mirror is the most common example of specular light reflection. It usually consists of a glass sheet in front of a metallic coating where the …
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