Scientists develop laser that can mark the air

Posted by ijlmond on Friday July 22, 2022 @11:29AM
from the independent.co.uk dept.

https://www.independent.co.uk/tech/laser-wuhan-china-quantum-computers-b2128999.html

( 3 comments | 10 points | on HN )

Re:Scientists develop laser that can mark the air by rapjr9 on Friday July 22, 2022 @03:27PM (#32196114)

Something like this has been done before:

https://www.thisiscolossal.com/2014/11/an-aerial-laser-displ...

Not sure why there don't seem to be any practical uses of it (at least I have not seen any such displays anywhere in my life or for sale anywhere.) Maybe because the brightness of the lasers is a public danger. Seems like otherwise we would have laser video projected onto the sky by now for advertising.

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Re:Scientists develop laser that can mark the air by Pakdef on Friday July 22, 2022 @11:32AM (#32193065)

"In order to turn the air into light, the energy density required is roughly a trillion watts per square centimeter."

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Re:Scientists develop laser that can mark the air by cm42 on Friday July 22, 2022 @02:28PM (#32195470)

I suddenly need to know how many Bitcoin networks' worth of rainforests this kills each time it displays an advertisement

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