In science and technology, the method of spectral analysis is used, with the help of which the qualitative and quantitative chemical composition of a substance is determined from the spectrum. The spectral analysis method is used, for example, in metallurgy for remote control of the chemical composition of a substance. Spectral analysis is used to determine the chemical composition of stars located at great distances from the Earth.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.