• Study of optical spectra of two electron systems using the example of a mercury atom;
• Experimental determination of the wavelengths of the most intense spectrum lines.

The setup consists of a spectrometer, a mercury lamp, a power supply unit, and a collimator. The spectrometer is based on a diffraction grating and a CCD matrix located in the focus of the mirror behind the diffraction grating. The spectrometer resolution is 0.5 nm. A special computer program is used to control the spectrometer and read information about the spectral composition of the analyzed radiation, which has a single and continuous spectrum reading mode, as well as the necessary tools for their analysis. The sensitivity of the spectrometer is adjusted in the program working with it by changing the time of exposure of the radiation to the CCD matrix.

The data are presented on the computer screen in the form of a spectrum – the dependence of the radiation intensity on the wavelength. The tasks of the laboratory work include recording the strongest lines (a short data accumulation time is set in the program) and measuring the position of weak lines (the data accumulation time is increased by 30 – 40 times). In both cases, the dark spectrum (the spectrum recorded without turning on the mercury lamp) is subtracted. The wavelengths of all the obtained lines are compared with the tabular data.