Quasar spectra is a field of research that focuses on studying the emission spectra of quasars, which are extremely bright and energetic objects located in the centers of galaxies. These objects emit radiation across the electromagnetic spectrum, from radio waves to gamma rays. By analyzing the detailed spectral features of quasars, researchers can gain valuable insights into the physical properties of these distant and powerful objects, as well as the environments in which they are found. Quasar spectra can reveal information about the composition, temperature, density, and motion of the gas and dust surrounding the quasar, as well as the processes responsible for the intense emission of radiation observed from these sources.