IB Biology Extended Essay Exemplar: How do different wavelengths of light (blue: 450–495 nm, red: 620–750 nm, green: 495–570 nm, white: 400–700 nm, and yellow light: 560-590nm), affect the rate of photosynthesis in Elodea canadensis (Elodea plant), as measured by the pH change of sodium hydrogen carbonate solution (NaHCO3) with an initial pH 8.30 0.05, using a pH meter for 2 hours? | RevisionDojo