Energy Levels are Representations of Shells & Orbitals in the Atom

Yes ! Energy Levels (or energy states )are Representations of either Shells or Orbitals in the Atom, depends on the physical concept. To explain the transition of electrons from one state to the other we use two energy states that are responsible, to explain it we draw two lines, just for representations to explain the physical phenomenon. While students sometimes think in different way, there is no physical gap except to the difference of energy on the same scale. We use this concept in LASER (Light Amplification by Stimulated Emission of Radiation)

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