From: valends3@gmail.com   
      
   On Tuesday, January 24, 2017 at 5:45:00 AM UTC-5, ewu...@gmail.com wrote:   
      
   > 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.   
      
   We already have those devices: they're called "digital cameras". (The   
   photons/waves don't bounce off anything -- they're focused by a lens, then   
   directly absorbed by a CCD and converted into electrical signals.)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)