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Q.
In Engelmann's experiment, bacteria were used to
NTA AbhyasNTA Abhyas 2022
Solution:
In his experiment, T.W Engelmann (1843 - 1909) split light into its spectral components using a prism and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria. The bacteria were used to detect the sites of O2 evolution. He observed that the bacteria accumulated mainly in the region of blue and red light of the split spectrum. A first action spectrum of photosynthesis was thus described. It resembles roughly the absorption spectra of chlorophyll a and b.