We took electromagnetic waves this week, and They specified that only accelerated charges make electromagnetic waves. So from my previous reading on the internet about speed of causality, I came up with this. That if a charge is moving at a constant velocity, It's field follow is it instantaneously. As there is no need for information to travel because you can predict its trajectory...but if it accelerates, then you cant and if you are observing it from outside you cant instantaneously know that it had started to accelerate. So at each moment it produces a field "Piece of information" That moves at the speed of light which takes time to reach you. then when it stops you will go back to the normal constant velocity so there is a gap between these two which represents the acceleration and it travels away. With this true, You can make any shape you want like a sin wave through an antenna. But I have a tiny problem with this, How is momentum conserved when a for example electron is placed in the outside field where the charges appear to not have moved yet? Somehow fields conserve momentum? They have their independent energy and momentum? (Probably all of this is non-sense), Please if it is wrong, can you explain it in simple highschool terms? because all websites takes about complicated stuff.