anybody got a "light" So i have been thinking about this for a while and researched a fair amount... I understand from the maxwell equations we find that light is pure energy and has matter-like characteristics such as momentum but it in fact does not have mass. Light is energy and energy has characteristics of matter because matter and energy are forms of the same thing. So in a vacuum nothing with mass can move faster than the speed of light. I have heard that in nuclear reactors there are particles with mass (very little mass but still mass) that can move faster than the speed of light THROUGH WATER which creates a "sonic boom" of light in a sense. I wonder how this is possible that light with no mass has more resistance when moving through water than something with mass. Just interested in some input... im sorry if my wording isnt clear... i find that sometimes when i post here people tear apart my wording. If you want me to clarify... let me know. Hit me with your best shot!