Thank you for your answer.

I have seen the explanations for the "madras" example, but i believe they describe 2 different forces.

And i have also read/seen many many descriptions from people who try to explain Einstein`s theories, but it have become clear to me that most of them have misunderstood him.
That is why there for example is many people who actually believe that Einstein said we could travel in time, almost like Doctor who, because they did not understand that it was one of the effects of light he was talking about.

So to avoid all those misunderstood explanations for Einstein`s theories, i have decided to read his original writings my self.

But those who believe they can just start to read those papers, and understand what he actually said, have probably never tried to do that.
To be able to read those and actually understand what he said, one need a lot of background knowledge.

One of the first things i discovered that i fully need to understand before i can understand his writings, was electrodynamics.
But to be able to understand electrodynamics again, it is necessary to understand Algebra, calculus and classical mechanics..
So that is what i am reading my self up on now, to be able to go on reading his papers.

And my guess is that when i fully understand this things, i probably will have to learn even more things to understand his next chapter.. lol

But i know it will be worth it in the end.

But for now, i have learned that it is a must to fully understand Algebra, Calculus, Classical mechanics and electrodynamics just to be able to understand the first chapter.. ;)

Simplified explanations on Einstein or Bohr`s paper work are almost doomed to be both wrong and misunderstood.