Posted on 05/22/2017 10:20:31 AM PDT by Red Badger
Wi-Fi can pass through walls.
This fact is easy to take for granted, yet it's the reason we can surf the web using a wireless router located in another room.
But not all of that microwave radiation makes it to (or from) our phones, tablets, and laptops. Routers scatter and bounce their signal off objects, illuminating our homes and offices like invisible light bulbs.
Now, German scientists have found a way to exploit this property to take holograms, or 3D photographs, of objects inside a room — from outside it.
"It can basically scan a room with someone's Wi-Fi transmission," Philipp Holl, a 23-year-old undergraduate physics student at the Technical University of Munich, told Business Insider.
Holl initially built the device as part of his bachelor thesis with the help of his academic supervisor, Friedemann Reinhard. The two later submitted a study about their technique to the journal Physical Review Letters, which published their paper in early May.
Holl says the technology is only in its prototype stage and has limited resolution, but he is excited about its promise.
"If there's a cup of coffee on a table, you may see something is there, but you couldn't see the shape," Holl says. "But you could make out the shape of a person, or a dog on a couch. Really any object that's more than 4 centimeters in size."
(Excerpt) Read more at businessinsider.com ...
Could it be exploited to the point that it could replace x-ray and cat-scan?
:) :) :) :)
Of course the first place a perverted mind would go is...
“But you could make out the shape of a person, or a dog on a couch. Really any object that’s more than 4 centimeters in size.”
We need a definition of “unreasonable search and seizure”.
It’s probably related to the wave length, not sensitivity.
Size does matter.
heheheh. But the limit of resolution is limited by the wavelength of the radiation used to "make the view." 2.4 GHz -> about 12.5 cm wavelength
Not that ‘fine’........... yet.......................
Its minimum resolution is 4 centimeters? Well that’s some comfort. I assume its because of beam divergence and not some technological shortcoming.
Privacy is dead, and it won’t be other individuals who will know everything about you, and where to find you - it will be the state.
It’s probably related to the wave length, not sensitivity.
Size does matter.
I remember comic book adds for X Ray Specs. Ah yes, stimulates the dream of boys everywhere, to wonder what she looks like under her dress.............
Gonna need metal mesh in the walls.
Invest in STUCCO stocks....................
Or maybe they'll interface it with a rail gun.
“Of course the first place a perverted mind would go is...”
I am sure we will be able to trust them.
UWB does much higher resolution scanning today and can actually be useful. Ye canna break the laws’o physics, Jim...
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.