Question

Why Einstein never accepted Heisenberg's uncertainty principle as a fundamental physical law ???

Answer 1

Heisenberg uncertainty principle states that it is not possible to measure both the positions and the momentum of a particle simultaneously to arbitrary accuracy. If someone measures the position of a particle, the particle is disturbed, so its momentum changes.But Einstein thought of a way to explain the problems of quantum mechanics.That he would give a strong argument to show how position could indeed be measured without disturbing the particle. So, he never accepted Heisenberg principle as a physical law .