Question

Amongst red, blue and violet wavelengths, which one is most efficient for photosynthesis?

• A. Red
• B. Blue
• C. Violet
• D. None of the above

Answer 1

The correct option is A Red

A) The best wavelengths of visible light for photosynthesis fall within the blue range (425–450 nm ) and red range (600–700 nm). But red wavelengths of light are the most effective in photosynthesis because they have exactly the right amount of energy to energise, or excite, chlorophyll electrons and boost them out of their orbits to a higher energy level.
B) Blue is efficient for photosynthesis, but not as efficient as red.

C) Violet is not as efficient for photosynthesis as red and blue.
D) Red wavelengths are the most efficient for photosynthesis.
So the correct answer is 'Red'.