CBSE Class 11-science Answered
Describe the experiment performed by T. W. Engelmann to determine the
first action spectrum of photosynthesis.
Asked by Topperlearning User | 24 Jul, 2014, 09:40: AM
Expert Answer
Engelmann used a prism to split light into its spectral components, and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria. The bacteria were used to detect the sites of oxygen evolution.
He observed that bacteria mainly accumulated in the region of blue and red light of the split spectrum, thus giving the first action spectrum of photosynthesis.
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