Võttenurkade

Võttenurkade refers to the angles of incidence and reflection when light or other waves interact with a surface. In physics, particularly in optics, the law of reflection states that the angle of incidence is equal to the angle of reflection. These angles are measured with respect to the normal, which is a line perpendicular to the surface at the point of incidence.

The angle of incidence is the angle between the incoming ray and the normal, while the angle of reflection is the angle between the reflected ray and the normal. When a ray of light strikes a smooth, flat surface, it bounces off such that the angle at which it arrives is the same as the angle at which it leaves. This principle is fundamental to understanding how mirrors work and how light travels in various optical systems.

Beyond simple reflection, the concept of võttenurkade also applies to refraction, where light bends as it passes from one medium to another. While the angles are still measured relative to the normal, the relationship between the angle of incidence and the angle of refraction is governed by Snell's law, which involves the refractive indices of the two media. In more complex scenarios, such as with curved surfaces or diffractive elements, the angles can vary across the surface, leading to phenomena like focusing or dispersion. The study of võttenurkade is crucial for designing optical instruments and understanding wave phenomena.