### Negative Sign in front of Rydberg constant

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**Sun Oct 21, 2018 3:52 pm**In my discussion section, we went over a problem asking us to calculate the wavelength of light emitted in the n=3 to n=2 transition in the hydrogen atom. When the solution was put up, the equation used to solve this was

v= -R(1/n^2 - 1/n^2). I am confused as to why we put a negative in front of the Rydberg constant because the textbook lists this formula without the negative sign.

v= -R(1/n^2 - 1/n^2). I am confused as to why we put a negative in front of the Rydberg constant because the textbook lists this formula without the negative sign.