From: sungjunnoh0802@gmail.com   
      
   On Tuesday, January 24, 2017 at 5:45:00 AM UTC-5, ewu...@gmail.com wrote:   
   > Light needs a surface to bounce off, otherwise   
   > light cannot be detected, for example when in a dark room, a light   
   > bulb or cfl or LED light is switched on then we can see the furniture, walls   
   > in that room because the light is bouncing/reflecting of those   
   objects/surfaces.   
   > When a laser pointer is pointed at a screen or at a target that spot can be   
   detected   
   > because the laser beam falls on the target and bounces back and then is   
   detected   
   > by a photosensor.   
   >   
   > But, what if it was possible to detect a spot or point of light in just air,   
   without   
   > the need of a surface for that spot/point to bounce of.   
   > What would be the practical applications of such an invention.   
      
   Stealth because then you would know which spot to avoid to not get spotted by   
   light(various frequencies)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)