The most important wavelengths of light for photosynthesis are
A) the UV wavelengths.
B) the visible wavelengths between 400 and 525 nm only.
C) the IR wavelengths.
D) the visible wavelengths between 400 and 525 nm and between 600 and 700 nm.
E) the visible wavelengths between 600 and 700 nm only.

Question

Quizplus · Accepted Answer

The most important wavelengths of light for photosynthesis are those within the visible spectrum, specifically between 400 and 525 nm (blue-violet) and between 600 and 700 nm (red). These wavelengths are absorbed by the pigments in the chloroplast (mainly chlorophyll a and b) and are used in the process of photosynthesis. UV wavelengths are not utilized as efficiently by plants, while IR wavelengths are not absorbed as well by chlorophyll and are therefore less important for photosynthesis.

The Most Important Wavelengths of Light for Photosynthesis Are