Im really just searching for a general explanation! If you are solving a pretty standard left hand side differential equation, but a diracs delta function on the right hand side. I am abit confused about how to interpret this. If this is the case for the right hand side: r(t) = Diracs (t) ,for 0≤ t<T with the period T=2∏ Think of this as an periodic outside force on a spring system, now I dont know how to interpret this. Does this mean that r(t) repeats itself, at t=0, t=2∏ and so on. Or that the diracs delta equation only excists between 0 and 2∏? Since its a diracs delta equation, it cannot work over a longer time interval? Since its an instant impuls over an extremely small time space. If anyone could shed some light over this, I would be most gratefull. I am not looking for a solution, just general information on how to interpret this information with the diracs delta function Thank you, and excuse my poor english!