Engelmann's experiment - action spectrum

2019 Odisha 1 question

1. 1 Photosynthesis in Higher Plants Easy
   One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:
   A Violet and green light B Indigo and green light C Orange and yellow light D Blue and red light
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