[SOLVED] Value of inifinity? 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/(infinity???)^2) ) 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!!