A hydrogen atom with its electron in the n = 6 energy level emits a photon of the infrared light. Calculate the change in energy of the atom and the wavelength of the photon.
Using Rydberg's equation, the change in energy is 1.82 x 10^-19J
But I do not understand why the change of energy is positive
Wouldn't [tex]\Delta[/tex]E = -2.18 x 10^-18J (1/9 - 1/36) = -1.82 x 10^-19J ?