What did Engelmann observe when he split light into its spectral components and then illuminated Cladophora, placed in a suspension of aerobic bacteria?

Easy

A

He observed that the bacteria accumulated mainly in the region of green and red light of the split spectrum.
B

He observed that the bacteria accumulated mainly in the region of blue and red light of the split spectrum.
C

He observed that the bacteria accumulated mainly in the region of yellow and red light of the split spectrum.
D

He observed that the bacteria accumulated mainly in the region of violet and yellow light of the split spectrum.

Solution

T.W Engelmann 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 O₂evolution. 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.

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