Spectroscopy can be defined as the study of interaction between absorption and emission of light and radiation by material substance. Spectroscopy involves interaction of electron, proton and ions. Atomic spectroscopy involves the determination of elemental composition with the utilization of mass or electromagnetic spectrum. There are three techniques involved in the determination process of atomic spectroscopy namely atomic absorption, atomic emission and atomic fluorescence. When a light of sufficient wavelength comes in contact with an atom, the atom will absorb the light as it enters in an excited state is the principle involved in atomic absorption.
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