Rydberg Formula Calculator

Calculate the wavelength of a photon for a unielectronic species.

Step 1: Enter Atomic Parameters

Example: 1 for Hydrogen, 2 for He\(^+\)

Enter an integer (e.g., 1)

Enter an integer greater than \(n_1\) (e.g., 2)

Rydberg Formula: $$ \frac{1}{\lambda} = R_{\infty}\,Z^2\left(\frac{1}{n_1^2} – \frac{1}{n_2^2}\right) $$

Rearranged: $$ \lambda = \frac{1}{R_{\infty}\,Z^2\left(\frac{1}{n_1^2} – \frac{1}{n_2^2}\right)} $$

with \( R_{\infty} \approx 1.097373 \times 10^7 \, \text{m}^{-1} \).