Rydberg's Equation

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Rydberg's Equation

Postby WilliamNguyen_4L » Sun Oct 21, 2018 6:49 pm

Why in the equation ΔE=Rhc((1/nf^2)−(1/ni^2)) is nf always the smaller of the two energy levels?

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Joined: Fri Sep 28, 2018 12:28 am

Re: Rydberg's Equation

Postby Timothy_Yueh_4L » Sun Oct 21, 2018 6:49 pm

Since it is 1/nf^2 – 1/ni^2, the resulting energy value is positive if nf is the smaller value. Since delta E represents the change of energy, which tends to be a positive value, nf needs to be the smaller primary quantum number in order to satisfy that condition.

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