One of the assumptions that Engelmann made was that the sun (hislight source) emits equal numbers of photons at each wavelength inthe visible spectrum. In reality, the sun’s emission peaks in theyellow region of the spectrum, with relatively fewer photonsemitted in the red and violet-blue regions.

Recall that the action spectrum from Engelmann’s experimentplotted the rate of photosynthesis (as measured by oxygenproduction) versus wavelength. In each of the following graphs, theblack line shows Engelmann’s original action spectrum deduced fromthe distribution of aerotactic bacteria around the alga.

Which red line shows the same action spectrum correctedfor the unequal number of photons emitted across the visiblespectrum?

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Transcribed image text: Part C - Experimental prediction: The action spectrum One of the assumptions that Engelmann made was that the sun (his light source) emits equal numbers of photons at each wavelength in the visible spectrum. In reality, the sun's emission peaks in the yellow region of the spectrum, with relatively fewer photons emitted in the red and violet-blue regions. Relative solar emission (photons) 400 450 500 550 600 650 700 Wavelength (nm) Recall that the action spectrum from Engelmann's experiment plotted the rate of photosynthesis (as measured by oxygen production) versus wavelength. In each of the following graphs, the black line shows Engelmann's original action spectrum deduced from the distribution of aerotactic bacteria around the alga. Which red line shows the same action spectrum corrected for the unequal number of photons emitted across the visible spectrum? Oxygen production 40000GDD Wavelength (nm) 70 Oxygen production 400 7th SU B DC Wavelength (nm) Oxygen production Do 70 3D GD Wavelength (nm) Oxygen production 400 500 600 Wavelength (nm) 700 Oxygen production 400 500 600 Wavelength (nm) 700 Submit