A meteor slams into Earth and stops in a violent flash, even though the atoms in both are mostly empty space. The key is that “empty” here does not mean loose or available. Electrons occupy quantum states that behave like a set of locked seats in a stadium, enforced by the Pauli exclusion principle and electromagnetic repulsion.
As the meteor plows into air and rock, nuclei and electron clouds never actually touch in a classical sense. Instead, electric fields overlap and create enormous electrostatic forces over tiny distances. Those fields transfer momentum in a cascade, converting kinetic energy into heat, shock waves and ionization. In thermodynamic terms, huge ordered motion is rapidly redistributed, driving a spike in local entropy production rather than letting the meteor simply pass through the “gaps.”
At the scale of quantum mechanics, what looks like solid matter is a densely packed arrangement of allowed energy levels and force fields. That structure gives materials mechanical properties like rigidity, compressive strength and yield stress. When a hyperfast rock meets that structured lattice, it hits a wall not of bricks but of constraints: no spare states for electrons, no free path for nuclei, and no way to avoid dumping its motion into a burst of destructive energy.
