Question

The most effective color of visible light spectrum for photosynthesis is:

• A. red
• B. blue
• C. yellow
• D. green

Hint:

Chlorophyll absorbs red and blue light best, with red being the most effective for photosynthesis.

Answer 1

The Correct Option is A

The absorption spectrum of chlorophyll shows that red and blue light are the most effective for photosynthesis. However, red light is absorbed more efficiently than blue. Green light is the least effective because it is mostly reflected, giving plants their green color.Thus, the correct answer is \( \mathbf{(A) \text{red}} \).