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Edit: typo in title (infinity); sorry

1. The problem statement, all variables and given/known data

What is the shortest wavelength of light emitted by an electron in the Brackett series of spectra lines of the hydrogen atom?

2. Relevant equations

1 / (wavelength) = RH ( (1/nu^2) - (1/nl^2) )

3. The attempt at a solution

1 / (wavelength) = 1.1 x 10^7 ( (1/4^2) - (1/()^2) )infinity???

I am told the correct answer is 1.45 x 10^-6, but I cannot find it on my calculator because I am not sure what to put in the place of infinity.

Thanks!!

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# Homework Help: Value of inifinity?

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