How would a graph appear as an indicator of photosynthetic rate?

Question

The action spectrum of photosynthesis shows a high light absorption for violet/blueand orange/red and a low absorption for green/yellow. If we set up an experiment where narrow bands of unicolored light were shown on an aquatic plant such as Elodea, and we counted the number of bubbles of oxygen produced as a indicator of photosynthetic rate, how would the graph appear?

1) just like the action spectrum with peaks at violet/blue and orange/red and a trough at yellow/green.

2) exactly inverted from the action spectrum with a peak for yellow/green.

3) perfectly flat because many wavelenghts are uded by chlorophyll

4) a descending line because ultra-violet has more energy than infra-red.

5) There is no way to guess without actually running the experiment.

Answer 1

The profile would be the same as the action spectrum - 1) is correct answer.