Assume that it is possible to build an actual instrument that could measure both the position and the momentum of a particle imultaneously. In general, what impact would this device have on the field of physics?

Question

Assume that it is possible to build an actual instrument that could measure both the position and the momentum of a particle imultaneously.  In general, what impact would this device have on the field of physics?

irishboy123 · Answer

if you are talking about electrons and photons where the quantisation is noticeable, you would have broken the laws of physics. 

Heisenberg Uncertainty is not just a practical limitation imposed by laboratory kit, it is a fundamental aspect of nature: a particle cannot have both a definite position and momentum -  the wave is spread out over space.

anonymous · Answer

Ok -- so if the laws of physics are "broken", then what are the implications? This reference article sugests that it may be possible to obtain these desired measurents simultaneously. Particle Measurement Sidesteps the Uncertainty Principle http://www.scientificamerican.com/article/particle-measurement-sidesteps-the-uncertainty-principle/