Balmer Series
The spectral series of hydrogen atom emission lines resulting from electron transitions dropping from higher levels (n_i ≥ 3) to the n=2 level.
Governing formula
1 / λ = R_H (1 / 2² - 1 / n_i²), n_i = 3, 4, 5...
SI unit
Visible Light Wavelengths (nm)
In depth
The Balmer series falls primarily in the visible light spectrum. The prominent red H-alpha line (656.3 nm) arises from the n=3 to n=2 transition, providing a distinctive signature in glowing nebulae.
Examples in the real world
The bright red glow of emission nebulae in deep space caused by the H-alpha Balmer transition.