The monochromator comprises a dispersive element, an entrance slit and mirrors to create a parallel beam similar to sunlight, and an exit slit and mirrors to extract the monochromatic light. The prism and diffraction grating are typical dispersive elements. Table 1 shows. In this volume, we will describe the monochromator, an important part of the spectrophotometer that was explained in UV TALK LETTER Vol. Light containing various wavelengths can be broken down according to the wavelength. But why are two types available? This explains the.