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Japanese scientists invent floating 'firefly' light

reuters.com

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Re: Japanese scientists invent floating 'firefly' light

#8

The first image is a composite, the actual light is not microscopic.

I think it's a long-exposure shot, with the LED moving around in space and blinking in a specific way to generate a floating R

I think you're right.

Re: Japanese scientists invent floating 'firefly' light

#9
post #7

I assume they are pumping enough power to a single point to ionise the air and produce light. Would that much ultrasonic power be enough to burn human skin?

It's an LED on a tiny PCB with an inductive loop around it. One of the images in the gallery has a picture of it.

The ultrasonic puffs of air keep it suspended.

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