What is the Rydberg constant?
The Rydberg constant is R_∞ = 10,973,731.568160 m^-1 (uncertainty ±2.1e-5). It is one of the most precisely measured physical constants.
Open the interactive PhysRef tool →Key facts
| Value | 10973731.568160 m^-1 |
|---|---|
| Symbol | R_∞ |
| Uncertainty | ±2.1e-5 m^-1 |
| Use | Hydrogen spectral lines |
| Source | CODATA 2018 |
Frequently asked questions
What is the value of the Rydberg constant?
R_∞ = 10,973,731.568160 m^-1, used to predict the wavelengths of hydrogen spectral lines.
What is the Rydberg constant used for?
In the Rydberg formula for the wavelengths of atomic hydrogen emission and absorption lines.
Is the Rydberg constant exact?
No, but it is among the most precisely known constants, with a relative uncertainty near 1.9e-12.
Related pages
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