I just hought about it, and why is there not a correct definition of light? Some says they are particles, others say they are waves. Some say they are energy "packages"... If they are waves, they need something to travel through, as i understood as the elecromagnetic field that is everywhere. Does this field exist in places with no mass at all, or whats making this field? If they are particles, and since they go in all directions there must be infinite particles shooting out, which I consider impossible. And I do not understand this photon "packages" that my science book says. What do they mean about that, and what are these packages?