## Rydberg formula

Blake Salfer 1B
Posts: 30
Joined: Fri Sep 28, 2018 12:18 am

### Rydberg formula

How to you use the Rydberg Formula to calculate wavelength of radiation generated by the transition from n=4 to n=2?

Alexa_Henrie_1I
Posts: 61
Joined: Fri Sep 29, 2017 7:03 am

### Re: Rydberg formula

First plug in n=4 into the formula to solve for the energy at that level. Then do the same for n=2. After calculating these answers, find the difference between the two using Energyfinal-Energyinitial. Finally plug this difference into equation: wavelength=h(c)/E.

Dimitri Speron 1C
Posts: 60
Joined: Fri Sep 28, 2018 12:17 am
Been upvoted: 1 time

### Re: Rydberg formula

If you want to use the Rydberg Equation, use the final energy level = n1, the initial energy level is =n2. Then you simply plug in to a calculator and solve. As mentioned in lecture though, the other method is somewhat less susceptible to errors.

Posts: 30
Joined: Fri Sep 28, 2018 12:24 am

### Re: Rydberg formula

I agree with the previous replies, just plug in n=4 and n=2 to find the energy at each level. subtract the final and initial energy and plug in to find wavelength.

Nicholas Le 4H
Posts: 74
Joined: Fri Sep 28, 2018 12:24 am

### Re: Rydberg formula

Adding on, you can use the formula E=hR(1/n^2(final)-1/n^2(initial)) to find the energy difference in one step. Then plugging it back into the equation E=hv to find frequency and then using C=wavelength(frequency) to find wavelength.

michelle
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: Rydberg formula

You can use the one written in the textbook, which the professor didn't cover in lecture. That one is more straight forward to calculate the problems you mentioned. But he also said that he prefer students to use the equation he covered, which will also be used in exams.