Quantum Mechanics: The Uncertainty Principle

www.facebook.com … Quantum Mechanics (Chapter 4): The Heisenberg Uncertainty Principle. — Please SUBSCRIBE to Science & Reason: • www.youtube.com • www.youtube.com • www.youtube.com — 1. A Brief History Of Quantum Mechanics www.youtube.com 2. The Structure Of Atoms www.youtube.com 3. Wave Function And Wave-Particle Duality www.youtube.com 4. The Uncertainty Principle www.youtube.com 5. The Spin Of Fundamental Particles 6. Quantum Entanglement — In quantum mechanics, the Heisenberg uncertainty principle states that certain pairs of physical properties, like position and momentum, cannot both be known to arbitrary precision. That is, the more precisely one property is known, the less precisely the other can be known. This statement has been interpreted in two different ways. According to Heisenberg its meaning is that it is impossible to determine simultaneously both the position and velocity of an electron or any other particle with any great degree of accuracy or certainty. According to others (for instance Ballentine) this is not a statement about the limitations of a researcher’s ability to measure particular quantities of a system, but it is a statement about the nature of the system itself as described by the equations of quantum mechanics. In quantum physics, a particle is described by a wave packet, which gives rise to this phenomenon. Consider the measurement of the absolute position of a particle. It could be anywhere the particle’s wave packet has non …