Abstrakt
Solar energy is more and more used in everyday life. In addition to everyday objects such as solar calculators or solar garden lamps, photovoltaic power plants are becoming more and more common.
It would be a natural assumption that for solar cell performance visible light is necessary. Using solar kit toy containing a solar cell and a simple electromotor it can be easily shown that this is not true.
Moreover we can show to pupils that the range of visible region is defined by the sensitivity of our eyes, and that even though the electromagnetic radiation with slightly lower frequencies than the lower limit is undetectable by our eyes, a silicon solar cell can detect it.