The diagram below shows reflection in a plane ... Angle of incidence i = angle between the incident ray and the normal. Angle of refraction r = angle between the refracted ray and the normal.

For the angles, this diagram will help ... Let me assume that the index of refraction in air is 1. This means I can write: As θ 1 increases, so does the angular separation between the head ...

Figure 1: Diagram and SEM image of fabricated fishnet structure. Here we experimentally demonstrate the first 3D optical NIM by directly measuring the angle of refraction from a prism made of ...