Main Question or Discussion Point
Does the uncertainty principle contradict the idea that an object can be at rest relative to an observer? For example, in physics class we examined an electron in a box, and we assumed the walls of the box are stationary relative to the observer. But the uncertainty principle says delta p times delta x > hbar/2. So the walls of the box would have a definite position and momentum relative to the observer, violating the principle. Where is my error in logic.