Particle in a spherically symmetric potential

In quantum mechanics, a particle in a spherically symmetric potential is a system where a particle's potential energy depends only on its distance from a central point, not on the direction. This model is fundamental to physics because it can be used to describe a wide range of real-world phenomena, from the behavior of a single electron in a hydrogen atom to the approximate structure of atomic nuclei.

Source: Wikipedia — Particle in a spherically symmetric potential (CC BY-SA 4.0)