General information about diffraction

This article will cover General information about diffraction. It is a universal wave phenomenon and is characterized by the same laws when observing wave fields of different nature. Since in most cases of practical significance, this limitation of the width of the wave front always occurs, the phenomenon of diffraction accompanies any process of wave propagation. It is the phenomenon of diffraction that sets the limit of the resolution of any optical device that creates an image, which can not be violated in principle at a given width of the radiation spectrum, used to build the image.