Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly. In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll.
Making a hypothesis is the first step of the scientific method, then it is disproved we start over from the beginning. Make a new hypothesis, test it again and see if the data supports the hypothesis. Continue this until you have a proper conclusion.