Laser experts, we need to know something: Would this work? The Virtual Wall is designed as a replacement for traffic lights and if made would use "plasma laser beams" to project silhouettes of moving people into the path of oncoming traffic.
Supposedly this would calm traffic and make drivers more careful around the soft humans as they cross the street. I’d say it would be more likely that the appearance of giant red figures before the windshield would cause panic, crashing and general mayhem.
But on to the tech. Lasers in movies can always be seen lancing through thin air, but in real life I was taught that they need something off which to reflect — smoke, perhaps. So the question is, is there a kind of laser that could be seen in air, and more, seen in air in daylight?
Can’t Cross A Virtual Wall [Yanko via Tina Paterson Blog]
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