3 ms·
Hmm the purple excited me for a second. I spent a while in my twenties and thinking about this, and one of the possibilities I came up with was 2-photon excitat
by astazangasta 12y ago
Hmm the purple excited me for a second. I spent a while in my twenties and thinking about this, and one of the possibilities I came up with was 2-photon excitation of nitrogen to produce fluorescence - which would be purple. With two lasers you could draw a purple dot at any point in air. No idea if this would work, of course.
- TazeTSchnitzel 12y agoSomething along those lines has been done successfully (ionising air): https://www.youtube.com/watch?v=KfVS-npfVuY https://www.youtube.com/watch?v=KfVS-npfVuY