Engelmann’s Experiment (1888): Action Spectrum of Photosynthesis
T.W. Engelmann used Cladophora (a filamentous alga), a prism to split light, and aerobic bacteria to study photosynthesis.
Observation: Bacteria clustered in blue-violet and red light regions, showing maximum oxygen release. Very few gathered in the green region.
Conclusion: Blue and red light are most effective for photosynthesis, while green light is least effective. This experiment demonstrated the action spectrum, aligning with the absorption spectrum of chlorophyll a.
Bio by Priti
Engelmann’s Experiment (1888): Action Spectrum of Photosynthesis
T.W. Engelmann used Cladophora (a filamentous alga), a prism to split light, and aerobic bacteria to study photosynthesis.
Observation: Bacteria clustered in blue-violet and red light regions, showing maximum oxygen release. Very few gathered in the green region.
Conclusion: Blue and red light are most effective for photosynthesis, while green light is least effective. This experiment demonstrated the action spectrum, aligning with the absorption spectrum of chlorophyll a.
#BioByPriti #Photosynthesis #NCERTBiology #Class11Biology #ScienceExplained #LifeSciences
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