Home » All Calculators » Physics and Astronomy » Rydberg Formula Calculator

Rydberg Formula Calculator

Photo of author
Published on

The Rydberg Formula Calculator is a tool designed to simplify the process of calculating the wavelengths of the spectral lines in hydrogen-like elements. This calculator uses the Rydberg formula, a fundamental principle in atomic physics, to predict the wavelengths of light that hydrogen atoms emit or absorb when electrons transition between energy levels.

What is the Rydberg Formula?

The Rydberg formula is a mathematical expression used to determine the wavelengths (λ) of light for hydrogen-like elements. The formula is:



  • λ represents the wavelength of the emitted or absorbed light,
  • R is the Rydberg constant, approximately 1.097373×107 −11.097373×107m−1,
  • 1n1​ and 2n2​ are the principal quantum numbers of the lower and upper energy levels of the electron (with 2>1n2​>n1​).

How Does the Rydberg Formula Calculator Work?


The Rydberg Formula Calculator requires two main inputs:

  • n1​: The lower energy level (integer, 1≥1n1​≥1)
  • n2​: The upper energy level (integer, 2>1n2​>n1​)

Calculation Steps

Here’s how the calculator determines the wavelength of light:

  1. Enter the Energy Levels: Input values for 1n1​ and 2n2​, ensuring that 2n2​ is greater than 1n1​.
  2. Calculate the Inverse Wavelength: The formula 1=(112−122)λ1​=R(n12​1​−n22​1​) is used to compute the inverse of the wavelength.
  3. Determine the Wavelength: Finally, take the reciprocal of the result from step 2 to find the wavelength, λ.

Example Calculation

To illustrate, let’s calculate the wavelength for the first line in the Balmer series of hydrogen, where 1=2n1​=2 and 2=3n2​=3:

  1. Input 1=2n1​=2 and 2=3n2​=3.
  2. Use the formula to compute:1=1.097373×107(122−132)λ1​=1.097373×107(221​−321​)
  3. The result gives the inverse of the wavelength. Taking its reciprocal gives the actual wavelength, which will be around 656 nm.

Relevant Information Table

1n1​Lower energy level2
2n2​Upper energy level3
RRydberg constant1.097373×107 −11.097373×107m−1
λCalculated wavelengthApprox. 656 nm for 1=2n1​=2, 2=3n2​=3

Conclusion: Benefits and Applications

The Rydberg Formula Calculator is an essential tool for students and researchers in the field of physics, particularly those studying atomic spectra and quantum mechanics. It simplifies calculations, saves time, and enhances understanding of electron transitions and spectral lines. By providing a straightforward method to compute wavelengths, this calculator aids in the analysis of atomic behavior and the validation of theoretical models. This can be invaluable in educational contexts, laboratory research, and the development of technologies based on spectral analysis.

Leave a Comment