= Goos–Hänchen effect
{wiki=Goos–Hänchen_effect}
The Goos–Hänchen effect is a phenomenon observed in the field of optics and wave physics, particularly in the context of total internal reflection. It describes the lateral displacement of a light beam when it reflects off the boundary between two different media at an angle greater than the critical angle. When a light wave hits the interface between two media (like air and glass) at an angle greater than the critical angle, it undergoes total internal reflection.
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