Quote (Voyaging @ Jun 10 2016 10:56pm)
What do you mean by this?
My tology is rock hard for you to get on.
When you look at typical speeds the errors are on the order of 0.0000000001%. I did the calculation for a person walking 10 m/s on a train going 5m/s and the error in the person's total walking speed went down to 1x10^-15 m/s. For the vast majority of systems it is "correct", as "correct" as we can ever get in science.
If you're talking in overly technical terms, yes, it's incorrect all the time for every application, but then so is every theory ever proposed, including quantum mechanics and relativity.
We actually can't apply an exact solution of any quantum mechanics equation ANYWHERE in the real world. It's always approximations based on the Schrodinger equation.