Experiment 4 investigates the relationship between energy (in the form of heat) and light and also the nature of light itself. You will build your own passive solar oven and test it to see how much of the available light energy you can capture and turn into heat energy. You will then collect the spectra of several light sources and compare them. After you have read the experiment, answer the following statements as either true/false. A. True The air around the oven is used to insulate the oven. B. False Water will be used to store energy. In this experiment we will measure the change in mass over time. Watts striking the earth's surface is the same anywhere you go. In this experiment you will test a solar oven.