Pigments are substances that have an ability to absorb light, at specific wavelengths. Can you guess which is the most abundant plant pigment in the world? Let us study the graph showing the ability of chlorophyll a pigment to absorb lights of different wavelengths. Of course, you are familiar with the wavelength of the visible spectrum of light as well as the VIBGYOR.
Match the column: Column I A. Absorption spectrum B. Action spectrum C. Engelmann’s experiment D. Carotenoids Column II 1. Range of light absorbed by pigment 2. Wavelength effectiveness for photosynthesis 3. Demonstrated O₂ release at red and blue light 4. Accessory pigments absorbing blue-green light
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