Writing Resources
Measuring visible light absorbance Lab Report by Purpose The purpose of this experiment is to determine what part of the light spectrum the spinach extract absorbs the most Hypothesis My hypothesis is that the spinach extract will absorb the most red purple and blue light and will not absorb much green or yellow light Reason for my hypothesis The reason for my hypothesis is that because we see spinach as green it is absorbing all light except green and therefore the spinach extract would absorb the least amount of green and the least amount of red or purple which is the opposite to green on the color wheel Materials 1 Spinach plant at least 1g 2 Mortar 3 Pestle 4 20 ml of 70 isopropyl alcohol 5 Funnel 6 Filter paper 7 Spectrovis plus spectrophotometer 8 Computer will the proper data collection program installed 9 Empty Cuvette 10 Time measuring device Method Refer to handout Results Refer to graph Statement of Learning What I learned from performing this experiment is that organisms such as plants appear to be a certain color because they absorb all the light in the visible light spectrum except the ones they reflect which is what you see For example the spinach in the experiment did not absorb much green light in the light spectrum because that is what is most reflected Safety considerations None Analysis Questions
