what property determines the wavelength absorbed by the molecule
Report Abuse. The specific wavelength of light that can be absorbed is determined by the chemical bonds in the pigment molecule. Pigments have an alternating arrangement of single and double bonds, they are conjugated bonds. Chlorophyll's conjugated bonds are found in the porphyrin ring that chelates the Mg.
Best Answer: I have never heard the question put like that before, but I would say it is the color of the pigment that determines what wavelength of light is absorbable. Light has what is called 'color temperature', or Kelvin temperature. Depending on the wavelength of a particular light source, the light will have a different color (temperature). The reason a plant looks, say, green, is because chlorophyll absorbs all the colors but green (roughly), and reflects the green color away.