Englemann (1882) observed the accumulation of | vedclass

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(B) Theodor Englemann used a prism to split light into its spectral components and illuminated the green alga $Cladophora$ placed in a suspension of a

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The absorption spectrum of $O_2$ evolution is blue and red

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(B) Theodor Englemann used a prism to split light into its spectral components and illuminated the green alga $Cladophora$ placed in a suspension of aerobic bacteria. He observed that the bacteria accumulated mainly in the regions of blue and red light. Since aerobic bacteria require oxygen for survival,their accumulation indicated that these specific wavelengths of light were most effective for photosynthesis,leading to the maximum evolution of $O_2$. Thus,he concluded that the action spectrum of photosynthesis (which corresponds to $O_2$ evolution) resembles the absorption spectrum of chlorophyll $a$ and $b$,showing peaks in the blue and red regions.

Englemann $(1882)$ observed the accumulation of aerobic bacteria around the blue and red light regions of a chloroplast in the green alga $Cladophora$. He therefore concluded that:

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