The first chart shows the photosynthesis rate; by oxygen release. The second diagram shows the absorption by chlorophyllin a of various light wavelengths; the rate of photosynthesis is superimposed. In the peaks and troughs of both the graphs appear to imitate each other. The diagrams peak at a wavelength of over 400 nm, which is equal to blue. The two diagrams then appear dry. Then it peaks again between 600 and 700 nm, which is the same as red. This therefore shows that the spectrum of action and absorption overlaps. The black line shows the photosynthesis action spectrum, while the blue line displays the spectrum of absorption. Four 30–470 nm, 660–670 are the peak wavelength.