What was the outcome of T.W Engelmann's experiments on photosynthesis?

What was the outcome of T.W Engelmann's experiments on photosynthesis?
  1. He discovered the role of water in photosynthesis
  2. He described the first action spectrum of photosynthesis
  3. He discovered the role of oxygen in photosynthesis
  4. He discovered the role of chlorophyll in photosynthesis

Solution

T.W Engelmann observed that the bacteria accumulated mainly in the region of blue and red light of the split spectrum, leading to the description of the first action spectrum of photosynthesis.

Asked in: NCERT

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