GAL: Gradient Adaptive Lattice: GAL: Guggenheim Aeronautical Laboratory: GAL: Gas Analysis Laboratory: GAL: George A. Lincoln (WWII General) Gal: Galindian (linguistics) GAL: Guinea Airways, Ltd. GAL: Groupe Antiterroristes de LibÃ©ration (French: Anti-Terrorist Liberation Group) GAL: Gathering Arm Loader (mining) GAL: Graphics Adapter Language: GAL: Gimbal Angle Loss: GAL
1 If the distance between two magnets is doubled the magnetic force between them will fall to a quarter of the initial value. #(F//4)#.  If the distance between two magnets is halved the magnetic force between them will increase to four times the initial value. #(4F)#.
A magnetic field cause the attraction between the North and South poles of a magnet. In light, the strength of these fields changes with time and place. How fast this wave changes with time and place determines what color the light is. I can't tell you why light travels so fast. I can tell you one interesting thing though. Albert Einstein showed that light is the fundemental speed limit in the universe. Nothing with mass can move as fast as light.