A Spectrophotometer is a photometer required in the process of spectrophotometry, which is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength. Thus, the instrument is used for measuring transmittance or reflectance of solutions, transparent or opaque solids such as polished glass, or gases. Possessing features like spectral bandwidth and linear range of absorption or reflectance measurement, this instrument can also be used to measure the diffusivity on any of the known light ranges that usually cover around 200nm - 2500nm using different controls and calibrations. Spectrophotometers are used in various scientific fields including physics, materials science, chemistry and molecular biology. The instrument is extensively used in industries such as semiconductors, laser and optical manufacturing in addition to laboratories for the study of chemical substances.