There are two main absorption bands, in blue (450 nm) and in red (670nm), due to the absorption of the two main leaf pigments: the chlorophyll a and b which account for 65% of the total leaf pigments of superior plants.
(two main absorption bands; account; for 65% of the total leaf pigments of superior plants)
two main absorption bands
account
for 65% of the total leaf pigments of superior plants