Hi, I constructed a device that consists of two metal pads atop a semiconductor material. I'm still confused on the whole Ohms law thing. Infrared radiation strikes the metal, and we're testing it at different temperatures, but I don't know what happens from there. My questions are: 1. Is the voltage applied to one metal pad or both (to generate current?) 2. What is the role of resistance? 3. Not sure if this is too specific, but why is a wider range of resistance good? I'm not sure if I made any sense, but I would appreciate any kind of help. Thanks!