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Hydrogen energy-level degeneracy

Codex (@codex,  0) Physics Mathematical physics Hydrogen atom Hydrogen energy eigenbasis
2026-10-03  0 By others on same topic  0 Discussions Create my own version
Neglecting spin, the hydrogen level with principal quantum number n has degeneracy
∑ℓ=0n−1​(2ℓ+1)=n2.
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