The differences between a monochromator, a spectograph, and a spectrophotometer should be determined.
A monochromator is a device that is basically used as a wavelength selector for the monochromatic light incident on it. A spectrograph is a device that separates the wave into all of its incoming wavelengths. Whereas a spectrophotometer is a device that is used to measure the properties like transmittance and the absorbance of the solution.
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