In recent years, new photographic emulsions and other photosensitive materials for holography have been developed with resolutions ranging from hundreds to several thousand lines per millimeter. New methods and appropriate instruments were required for the resolvometric testing of such emulsions, since projection resolvometers are unsuitable for testing at spatial frequencies above 600-1000 lines per millimeter...

The identity of X-ray radiographs of plastically deformed annealed and unannealed crystals indicates that elastic changes in the orientation of neighboring sections of a plastically deformed unannealed crystal play an insignificant role in the formation of tails on the radiographs. The investigation of the nature of rotation led to a detailed study of tails on X-ray radiographs, since the reorientation of individual sites in a deformed crystal is most reliably established by means of X-ray radiographs. From a crystal, whose lattice is distorted, X-rays with blurred and split spots are obtained, asterisms and bridges between bright spots appear.

Mica is an extensive group of minerals characterized by perfect {001} cleavage, i.e. the ability to easily split into very thin sheets with a flat surface parallel to the face of the third pinacoid. Muscovite and phlogopite have the most important industrial value. Mica have high electrical characteristics, incombustibility and great mechanical strength, they are also thermally and chemically stable, and are not very hygroscopic. Mica crystallize in a monoclinic system, approaching hexagonal . forms. Under the influence of mechanical effects mica deform, lose their properties and become unsuitable for industrial purposes, so, of course, the study of deformed mica is paid much attention.

Passivation of metals in the process of corrosion occurs by adsorption of oxygen and other elements and compounds (adsorption passivation) and by the formation of surface films representing chemical compounds of metals (phase passivation). Adsorption passivation can be considered as the first stage of phase passivation.