1
vote
4answers
463 views

Radio antenna producing waves in the visible spectrum

If a radio could produce waves in the visible light spectrum, what would the result be? This is a thought experiment that I've pondered for a few years now. I realize there are a few/many real-world ...
26
votes
3answers
3k views

Can I use an antenna as a light source?

Can I use a normal metal antenna to emit visible light?