What is the uncertainty principle?

[Achilles]

This is basically what I got out of my textbook but I switch it into my own words 

The uncertainty principle says that you can't know both the position and momentum of particle without it affecting one or the other.

Is  this correct, also could you add more depth to it like tell me WHY this is so... thanks in advance

[swansont]

Because the two variables are represented by waves, and related by a Fourier transform. It’s not that one affects the other, you just can’t determine both at the same time 

[Phi for All]

This makes it sound like my knowledge alone could physically change either property.

[studiot]

I was considering answering this one,

BUT

The OP was online for a good half hour after swansont gave his answer.

Now I see that the OP has been back for a further hour or so.

Clearly he doesn't care about the subject to waste more time on an answer.

I say waste more because I answered quite a few of his early threads and am still waiting for an answer on all of them.