You can see two peaks that correspond to the blue (425 nm) and red (~660 nm) light being absorbed by the leaf.

You can see two peaks that correspond to the blue (425 nm) and red (~660 nm) light being absorbed by the leaf. Our eyes perceive the colour of leaves to be green because the chlorophyll in the leaf absorbs the blue and red light while reflecting the green light back to your eyes.

Pre-Lab Question

If chlorophyll had absorption peaks at 550 nm and 650 nm rather than 425 nm and 660 nm what colour would the leaf appear to your eyes?