Quote:


since you aren't aware of where it really is then in practice it's still just at one place





Nope , there is subtle difference

Suppose that you have a bouncing ball inside a box

You take a snap at some time intervals : t1,t2,t3.....tn
You plot the positions of the ball : p1,p2,p3....pn and you connect the points
You get a "path"
Consequently you can predict the position of the ball

Suppose you have an electron , inside a box
You dont get any "path" rather a sort of probability distribution

In other words

Suppose that at time tn the ball is in Pn
You repeat the measuring a fraction of time later : tn + dt

No real object can exceed the speed of light, consequently at time tn + dt the ball must be inside a sphere with center in Pn and radius <= c*dt
You measure and you find the ball inside the sphere

Again , repeat the test with an electron

You can find the electron even outside the sphere

What conclusion can be drawn ?

Either the electron can travel at a speed higher than the speed of light or :

If you dont "see" the electron , the electron is a wave.
It is everywhere inside the box
If you try to spot the electron, you make it turn( collapse) into a small ball

It seems absurd but nobody has still found a better explanation

Last edited by AlbertoT; 09/07/07 18:11.