"Determination of the wavelength of laser radiation by means of diffraction grating" : Methodical instructions for the implementation of the laboratory” of the author’s team is an indispensable assistant for students, teachers and specialists who seek to better understand the subtleties of laser physics and the practical application of diffraction methods. This book is a carefully developed guide that reveals all the nuances of the process of measuring the wavelength of laser radiation, making complex technical aspects available even for beginners. The focus of this work is the practical application of the diffraction grating as a tool for accurately determining the wavelength of the laser. Authors with extensive experience in the field of optics and laser technologies, step by step guide the reader through all stages of laboratory work. From the theoretical foundations of diffraction and the principles of the diffraction grating to practical recommendations for equipment preparation, configuration and experimenting, every detail here is thought out to the smallest detail. The book describes in detail the methods of calibration, measurement features and methods of processing the data obtained, which allows to achieve high accuracy and reliability of the results. This book will be especially useful for students studying in specialties related to physics, optics, photonics and radio engineering, as well as teachers looking for structured teaching materials for laboratory classes. It is perfect for those who are just beginning to get acquainted with laser technologies, as well as for specialists who want to refresh their knowledge or improve the skills of practical measurement of laser parameters. The topics raised in the book go beyond a simple guide to doing lab work. Here we consider the fundamental principles of diffraction, the role of the diffraction grating in measurements, the features of laser sources, as well as issues of accuracy and error. The authors emphasize the importance of proper preparation and accuracy in the experiment, which is especially important in the context of modern scientific and technical progress. Thanks to this, the book becomes not only a practical tool, but also a valuable source of knowledge, expanding the horizons of the reader. The presentation style is distinguished by clarity, logical consistency and attention to detail. The team of authors uses clear explanations and illustrations, which makes even the most complex topics accessible to perception. In general, this methodical book is not just a collection of instructions, but a full-fledged textbook that will help form a solid base of knowledge and skills necessary for accurate measurements in the field of laser optics. If you are interested in the practical aspects of laser technology , want to learn how to determine the wavelength of laser radiation with high accuracy or are looking for a reliable methodological guide for laboratory sessions “Determining the wavelength of laser radiation using a diffraction grating” will be your indispensable assistant. This book deserves the attention not only of professionals and students, but also of everyone who appreciates accuracy, scientific approach and strives for professional development in the field of photonics and optical measurements.