“Diffraction” of light can be understood as any deviation of light rays from their geometrical propagation line (that is straight in a homogeneuos material) An example (shown in the picture):The edge of shadow is never perfectly sharp. Some light appears in the geometrical shadow, and there are dark and light fringers in the area of illumination. | f EKICDAI DUVQICQ GENERAL rnTOiCo III Optics Quantum Physics Chapter XVIII Diffraction of light 1. Fresnel diffraction 2. Fraunhofer diffraction 3. X-ray diffraction from crystals Diffraction of light can be understood as any deviation of light rays from their geometrical propagation line that is straight in a homogeneuos material Area of illuminaton An example shown in the picture The edge of shadow is never perfectly sharp. Some light Point source --------------------------------------------- . J appears in the geometrical . shadow and there are dark and light fringers in the area of Sfr ght Geometrical edge illumination. shadow Diffraction of light can be considered as an argument for wave characteristics of light like other wave processes sound etc.
