FrancoItaly:
In the same way, is more cheap a copper-iron battery or copper-steel or copper-zinc.
We conducting this experiment: heat at light Sun for half or 1 hour a regular piece of copper and was detectable at 2 meters... What creates this?
Regarding this: over a copper plate put a zinc piece wich touch in the extremes of the plate. Leave at strong light Sun for half or 1 hour and connect a tester and measure the voltage, this is a galvanic-solar battery.
After the experiment, can cook hot-dogs:
