Comparing Red To White: White Light Results In More Algae Growth

Abstract

Photosynthesis is the process that keeps algae alive.  In our lab, we set out to answer whether or not changing white light for red light would affect the growth of the algae. We tested four samples of algae in red light and one sample of white light over a three week period and measured the cell density in weekly increments. We found some evidence that algae use multiple wavelengths of light in photosynthesis, and that optimal growth does not occur under red light alone. The cell density of the samples under red light from week one to week two was minimal, showing only a small increase in cell density.  Week two to week three showed next to no growth.