by Shana Priwer & Cynthia Phillips, Ph.D.

Another major disagreement that Einstein had with quantum mechanics was over Heisenberg's uncertainty principle. As stated in 1927, Heisenberg's principle basically says that the more precisely the position of a subatomic particle is known, the less precisely the momentum can be measured, and vice versa. If an observer can measure the position of a particle with great accuracy, the particle's momentum cannot be measured nearly as well. But if the momentum is measured extremely accurately, then it will be the particle's position that is comparatively unknown. [Read more] ...