Question

question 83
which wavelengths of light are most efficiently absorbed by chlorophyll a?
a blue and red
b green only
c blue and yellow
d red only
e yellow only
question 84
what wave length of light would an orange pigment absorb least?
a green
b red
c yellow
d orange
e blue

Explanation:

• Question 83: Chlorophyll a has absorption peaks in the blue (around 430 nm) and red (around 662 nm) regions of the visible light spectrum. It reflects green light, which is why plants appear green. So, it most efficiently absorbs blue and red light.
• Question 84: A pigment appears a certain color because it reflects that color and absorbs other colors. An orange pigment reflects orange light and absorbs other colors. So, it would absorb orange light the least.

Answer:

• Question 83: A. blue and red
• Question 84: D. Orange