He demonstrates how total internal reflection can make a coin disappear inside a glass of water and bend a laser beam. The second demonstration is used as a model for fibre optics. Your class ...

In this situation, the ray is reflected inside the more dense medium, following the law of reflection. This is called total internal reflection (TIR). The angle of incidence when the angle of ...

In 1943, the two German scientists Goos and Hänchen performed an experiment showing that in total internal reflection a light ... is usually small (typically 10 −2 to 10 −5 rad), if you ...