Rydberg Equation Calculator

Calculate spectral line wavelengths for hydrogen-like atoms

Lower Energy Level (n1):

Upper Energy Level (n2):

Atomic Number (Z):

n2 must be greater than n1. Use Z=1 for hydrogen, Z=2 for He+, etc.

Balmer Series (Visible Lines)

H-alpha: 656.3 nm (Red)

H-beta: 486.1 nm (Cyan)

H-gamma: 434.0 nm (Blue-Violet)

H-delta: 410.2 nm (Violet)

Rydberg Formula

1/λ = R_H × Z² × (1/n1² - 1/n2²)

R_H = 1.097373 × 10⁷ m⁻¹

E_n = -13.6 × Z² / n² eV