Extreme-ultraviolet (EUV) radiation is a form of electromagnetic radiation with wavelengths ranging from about 121 nm to 10 nm, falling between the range of ultraviolet radiation and X-rays. EUV radiation is used in various scientific and technological applications, including semiconductor lithography, spectroscopy, microscopy, and astrophysics. In semiconductor lithography, EUV radiation is used to etch micro-scale features on computer chips. The small wavelength of EUV radiation allows for extremely fine details to be printed on silicon wafers, leading to more powerful and efficient electronic devices. In spectroscopy, EUV radiation is utilized for the analysis of atoms and molecules, due to its ability to ionize and excite these particles. This allows researchers to study the structure and behavior of materials at the atomic level. In astrophysics, EUV radiation is used to study the hot outer layers of stars, as well as the interstellar medium and the ionosphere of planets. The unique properties of EUV radiation make it ideal for observing and understanding the extreme environments found in space. Overall, research in the area of extreme-ultraviolet radiation continues to advance our understanding of the physical world and opens up new possibilities for technological innovation.