Question

The chlorophyll absorbs mostly

• A. Blue and green light.
• B. Blue and red light.
• C. Green and red light.
• D. Violet light.

Answer 1

The correct option is B Blue and red light.

Chlorophyll absorbs blue and red light. Blue is at the high-energy end of the spectrum, so light of this wavelength is responsible for this much excitation and explains the absorption peak in the blue. Red wavelengths are lower in energy and only boost the electron to a lower energy level than can blue light. Green light is not absorbed but reflected, making the plant appear green.

So, the correct answer is 'Blue and red light'.