### Rydberg Formula

Posted:

**Sun Jul 07, 2019 7:40 pm**In what ways can you alter the equation to find different values?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=27&t=45395

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Posted: **Sun Jul 07, 2019 7:40 pm**

In what ways can you alter the equation to find different values?

Posted: **Mon Jul 08, 2019 12:32 pm**

Rydberg Equation: 1/λ=R(1/n(1)^2−1/n(2)^2)

You can change n(1) and n(2), which refer to different energy levels in the Hydrogen atom. For example, you can use n(1)= 1 and n(2)=2 to find the wavelength of light emitted when an electron drops from the n=2 to the n=1 energy level (or the wavelength of light needed to excite from 1 to 2). You can change n(2) to n(2)= 3 to find the wavelength emitted when the electron drops from n=3 to n=1 instead.

You can change n(1) and n(2), which refer to different energy levels in the Hydrogen atom. For example, you can use n(1)= 1 and n(2)=2 to find the wavelength of light emitted when an electron drops from the n=2 to the n=1 energy level (or the wavelength of light needed to excite from 1 to 2). You can change n(2) to n(2)= 3 to find the wavelength emitted when the electron drops from n=3 to n=1 instead.

Posted: **Thu Oct 10, 2019 7:05 pm**

Instead of using the Rydberg formula, I prefer to simply find the change in electron energy between each energy level. We know the E_{n} = -(hR)/n^{2}. This gives us the energy of an electron at every energy level in the hydrogen spectra. Knowing this, we can set up an equation for Delta E, knowing that any Delta equation is simply the difference between final value and initial value. Delta is always, always, always final minus initial, otherwise the sign value will be wrong!