Rydberg formula

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Blake Salfer 1B
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Rydberg formula

Postby Blake Salfer 1B » Sun Oct 14, 2018 8:15 pm

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

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Re: Rydberg formula

Postby Alexa_Henrie_1I » Sun Oct 14, 2018 8:47 pm

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
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Re: Rydberg formula

Postby Dimitri Speron 1C » Mon Oct 15, 2018 4:15 pm

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.

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Re: Rydberg formula

Postby Madeera_Mian_3B » Thu Oct 18, 2018 11:09 am

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
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Re: Rydberg formula

Postby Nicholas Le 4H » Fri Oct 19, 2018 1:29 pm

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.

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Re: Rydberg formula

Postby michelle » Fri Oct 19, 2018 3:56 pm

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.

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