Quantum Forces: Why Matter Feels Solid
Originally Published 1 year ago — by Big Think
The solidity of matter, despite atoms being mostly empty space, is explained by quantum mechanics, particularly the Pauli Exclusion Principle. This principle states that no two fermions, such as electrons, can occupy the same quantum state simultaneously, preventing atoms from passing through each other and giving rise to the impenetrability of solid objects. This quantum mechanical rule, combined with quantum uncertainty and electrostatic repulsion, ensures that matter remains stable and occupies space, making everyday experiences like sitting in a chair possible.