The action spectrum, absorptance and quantum yield …
For green plants, including algae, the action spectrum shows that most
photosynthetic activity takes place in blue-violet and orange-red
lights since these are the colours which are mostly absorbed by the
main chlorophylls and the carotenoids.
Action spectra for photosynthesis and spectral scalar ..
An absorption spectrum is a graph showing the percentage of light absorbed by pigments within the chloroplast, for each wavelength of light. An example is the absorption spectrum of chlorophyll a and b. The best absorption is seen with violet-blue light. There is also good absorption with red-orange light. However most of the green-yellow light is reflected and therefore not absorbed. This wavelength of light shows the least absorption.
We can see how different wavelengths of light affect photosynthesis by
looking at action spectra.