When you are taking an absorbance spectrum, and measuring the absorbance at different wavelengths, this is the only factor that is changing, as the concentration of the solution remains the same, and so does the pathlength. ... The only difference to change the absorbance, is the
Does absorbance decrease with wavelength?
In Absorbance spectra initially Absorbance decreases with wavelength but after 700 m it increases.
How does wavelength relate to absorption?
The molar absorption coefficient is a measurement of how strongly a substance absorbs light. The larger its value, the greater the absorption. With larger conjugated systems, the absorption peak wavelengths tend to be shifted toward the long wavelength region and the absorption peaks tend to be larger.