Why is chlorophyll green?
a. It absorbs all wavelengths in the visible spectrum.
b. It absorbs wavelengths only in the red portions of the spectrum (680–700 nm).
c. It absorbs wavelengths only in the blue part of the visible spectrum (450–480 nm).
d. It absorbs wavelengths in only the blue and red parts of the visible spectrum.

Chlorophyll is a pigment found in plants, algae, and cyanobacteria that plays a crucial role in photosynthesis. It absorbs light primarily in the blue (450–480 nm) and red (680–700 nm) parts of the visible spectrum, which is essential for converting light energy into chemical energy. The green color of chlorophyll is due to its inability to absorb green wavelengths, which are reflected instead.

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye, ranging from approximately 380 nm to 750 nm. It includes all the colors perceived by humans, from violet to red. Understanding which wavelengths chlorophyll absorbs helps explain why it appears green, as it reflects the green wavelengths while absorbing others.

Light absorption occurs when a substance takes in light energy, while reflection is when light bounces off a surface. Chlorophyll absorbs light in the blue and red regions of the spectrum, which is used in photosynthesis, and reflects green light, making plants appear green. This selective absorption and reflection are key to understanding the color of chlorophyll.