A quantum jump, also known as a quantum leap, refers to a sudden transition of an electron from one energy level to another within an atom or molecule. This phenomenon is a fundamental concept in quantum mechanics. In more detail, when an electron absorbs energy (for example, from a photon), it can move from a lower energy state (or orbital) to a higher energy state. This transition is instantaneous and does not occur gradually; rather, the electron "jumps" between discrete energy levels.
Bagic jump between orbitals in the Bohr model. Analogous to the later wave function collapse in the Schrödinger equation.
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