A natural phenomena which made revolution in shaping the world is “light”. Any new born opens eyes, sees light and realizes the world. Light shows living things, non-living things, colours, scenically locations, good, bad
and every exixting in the world. These could happen with the visible light which we could see. As the electromagnetic theory developed by Clark Maxwell, light is a form of electromagnetic radiation and these electromagnetic radiation
possess electric and magnetic fields with the velocity of light. The electromagnetic spectrum has a wide range of regions with respect to the wavelength right from Radio waves to Cosmic rays. Based on the detection system, all the
spectral regions are detected and deployed. The interaction of electromagnetic radiation with matter reveals the details of basic unit of matter.
Physics, it is really hard to describe this subject in one or few words but to be precise, it is acknowledged as a study of nature. Physics which deals with the interaction between electromagnetic radiation and matter is called “Spectrophysics”.
It is a measurement that interprets the absorption and emission of electromagnetic radiation when atoms, molecules or ions more from one energy level to another.
The advancements in the spectroscopy of different regions of the electromagnetic spectrum have provided valuable informations for the investigation of molecular structure. The nature of the information required decides the selection of
the particular spectroscopic techniques. A spectral line is exhibited when atoms or molecules absorb radiation of energy and go to excited state and also atoms or molecules in excited state emit quantum of energy and drop to lower
Transitions between electronic energy levels give the spectrum in the visible or ultraviolet region and is referred to as electronic spectra. Vibrational spectra are due to transitions between vibrational levels within the same electronic
level which fall in the infrared region. Transitions between rotational levels within the same same vibrational give the spectra in the far infrared or microwave region and is referred as roational spectra. Alike, a nucleus or electron
can give interation energies when placed in a magnetic field. These give respectively, Nuclear Magnetic resonance (NMR) and the Electron Spin Resonance (ESR) spectroscopy.
Every region in the EM spectrum has numerous applications in the field of materials characterization, structural determination, etc., these help in the betterment of the existing materials and to find new materials with respect to the
internal structure of molecules or atoms.
Spectrophysics not only deals spectroscopy, it also meet the problems of spectrum of physics. All the existing problems and the solved problems in physics could be dealt beneath a universal column “Spectrophysics”.