The SET class did an experiment with solar panels. Two different experiments were done that tested the efficiency of the solar panels. The first experiment was to test the efficiency of the solar panel as the distance between the solar panel and the light source grew. The second experiment was to test the efficiency of the solar panel when the light source was covered with different colored lenses. It was observed that the solar panel put out les energy as it was mover farther away from the light source. It was later observed that the solar panel had the greatest output when an orange filter was used, which was followed by the less efficient blue filter, and then lastly the yellow filter.
Solar panels are also called photovoltaic cell which implies the ability to convert light energy into electricity. These cells are usually made of semiconductors. Silicon is a common semiconductor used. Semiconductors are used because when the light hits the cell a certain amount of the light is absorbed by the semiconductor. This absorbed light/energy allows electrons in the semiconductor to flow. When electrons flow a current is produced, and by placing a bit of metal somewhere on the solar cell the current can be directed for external use.
