Question

Among red, blue and violet lights which one is the most efficient for photosynthesis?

• A. Red
• B. Blue
• C. Violet
• D. None of these

Answer 1

Answer: (A)

Red

Answer 2

Pan of the spectrum used in photosynthesis has a wavelength between $400$-$700\, nm$ and is called photosynthetically active radiation. Red is the most efficient light for photosynthesis while green is the least effective.