In the figure given below , the black line(upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll 'a' , answer the followings:
Wavelength of light nanometera(nm)
What does the action spectrum indicate? how can we plot an action spectrum? explain with an example.

In the figure given below , the black line(upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll 'a' , answer the followings: Wavelength of light nanometera(nm) How can we derive an absorption spectrum for ny substance?

In the figure given below , the black line(upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll 'a' , answer the followings: Wavelength of light nanometera(nm) If chlorophll 'a' is reponsible for light reaction of photosynthesis, why do the action spectrum and absorption spectrum not overlap?

What can we conclude from the statement that the action and absorption spectrum of photosynthesis overlap? At which wavelength do they show peaks?