|  | 
         
          | Description: 
             These tiny rotors are constructed 
            of photosensitive resin and are about five microns in diameter, which 
            is the size of a red blood cell. They rotate via the force light exerts 
            on surfaces, similar to the way wind drives a windmill. |   
          | Source: 
             Hungarian Academy of Sciences |   
          | Story:  Light 
            spins resin rotors TRN January 17, 2001
 |   
          | TRN Categories: 
             Microelectromechanical Systems |   
          | Form: 
             Still |  |