Spectroscopy can be defined as the study of the association and the interaction between the matter and the electromagnetic radiation. The variants in the electromagnetic spectroscopy are electron spectroscopy and atomic spectroscopy. The dispersion of light based on the variations of wavelength through prism identified the conception of spectroscopy. The required association of the radiative energies and wavelength features evolved the theories under spectroscopy. With the presence of waves of the matters and the acoustic waves represents the frequencies of radiative energy in state of an electromagnetic spectrum. The reason for the considering emission spectrum to be presentation of the spectroscopic data due to the state of being treated as wavelength and frequencies. The conception of spectroscopy have experienced evolution in its meaning, the recent definition of spectroscopy is, inclusion of ions, electrons and protons with connected particles in state of the collision energy.

The concepts like quantum electrodynamics, quantum mechanics, relativity theory, emerged from the understanding of the phenomenon of spectroscopy. The influences and contribution of the theories of the phenomenon, spectroscopy is reflected in strong and weak forces, rather than just being limited to the understanding of electromagnetic power. Contribution of the theories of spectroscopy can be identified in different fields like, science and technology. Spectroscopy have represented its impact in the medical field through the feature of radio-frequency. The implication of spectroscopy in medical science can be reflected in Magnetic Resonance Imaging, commonly known as MRI. In the function of MRI (Magnetic Resonance Imaging), unprecedented resolution is used for understanding and visualizing the internal shift in cells and the tissue alignment.  The application of spectroscopy can be identified in the concepts like Big Bang theory, where three-degree blackbody radiations are identified through the usage of microwave spectroscopy. Spectroscopy theories reflects application in the conceptions like, existence principle, origin of universe and the structure of proton and neutron. The understanding about the elements before the first star, intergalactic molecules, constituents in distant stars were deduced from the application of X-rayspectroscopy. Another element in spectroscopy, optical spectroscopy helps in the identification of chemical and the physical nature of matters. 17^th century is considered to be the origination of the concept of spectroscopy. The understanding of the functioning of prisms and variants in design stimulated the knowledge regarding solar spectrum. The benefits of spectroscopy can also be experienced through the concepts of rainbow, which is regarded as the combination of white light.

Importance of the concept of spectroscopy can reflect upon the field of structuring and restructuring molecules and the atoms. Knowledge regarding the composition of matters and the physical and chemical features, evolved from the theories of spectroscopy. The implications of the concept of spectroscopy is experienced in the theories of spectral emission lines. The spectral emission lines are considered for the knowledge about expanding universe and astronomy. The evolutionary understanding of universe was facilitated through the concept of spectroscopy along with the origin of Magnetic Resonance Imaging in medical science and Relativity theory in physics.