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Yeah, electroplating is what it is called. A metal object is hooked up to a power source and then dipped into a gold (usually) solution. The gold is attracted to the other metal object and is plated onto it.
I've never heard of the theory that Egyptians had light bulbs. I found some interesting information about that, but it seems unlikely that they were indeed light bulbs. It's a pity that there were not more sites where those carvings were found, or we might know more about. Still, there is always the chance that it really was a light bulb.
Too bad we'll never really know about this stuff. I guess I'll just have to build a time machine and see for myself.
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