You can't hide!

During these times here are a lot of discussions about people losing their privacy, as websites like Facebook allow programs to access all your data. Only more and more of these discussions may appear after invention described in this post. After few years it won't be possible to hide anywhere as researchers found a way how to see what is around the corner! This sounds like it is from science fiction movie but it becomes truth. To successfully complete this, scientists used very advanced devices like a camera which captures images more than a billion times per second! I can bet every sport photographer would be jealous about this as every single moment of basketball match could be captured. Second device used is a femtosecond laser, which emits very very short pulses. Duration of every pulse, which left the laser, is thousand million million times shorter than a second! The brilliance of this idea is that the pulse is shot to the surface (let it be the door in this case as seen in the picture), which allows light to reflect around the corner we need. After reflection light goes into the room or other environment and starts bouncing from all surfaces. Some of these photons reflect back to the door and hits sensor of the camera. This camera can make not only images around the corner but 3D images as well. Mentioned feature is possible because of its capturing speed. It allows capturing photons which travels for different duration of time due to reflection of surfaces at different distances from the door. This looks to be a very simple technology but it really requires a lot of work, especially to write logarithms which could convert received signals into a real picture. And it is a long way till we will be able to use it, but it is coming!  This would be a very useful technology in war because lives could be saved, as soldiers could see if someone is waiting around the corner. It could also be used in cars to see if someone is coming and you can't see it. Believe me this would be very useful in small streets of Crete! I could continue with writing about different uses but there isn’t enough of space for it. Hopefully it just won't be used to stalk people so let's not allow that this very useful technology would go to hands of bad guys.

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