The effect of different colors of light on photosynthesis was tested by exposing groups of bean plants to light of specific wavelengths. Sugar
production of each groups of plants was measured and used as an
estimate of the rate of photosynthesis. Figure 1 shows the action spectrum
of photosynthesis. According to the results of the study, if plants are
exposed to only a narrow range of wavelengths of light, which of the
following ranges would produce would produce the greatest rate of
photosynthesis?
A 440 nm- 460 nm
B 490 nm - 510 nm
C 540 nm- 560 nm
D 590 nm- 610 nm