TBR Chem 2 Example 2.25

[MedPR]

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Answer C: "...so the lowest energy transition in the Paschen series emits a photon with a wavelength of greater than 656nm, and according to figure 2-32, higher than 800nm.

Where in figure 2-32 is it indicated that the Paschen series emits a photon with wavelength of greater than 800nm?

 

[Pisiform]

I think you have to infer this from the wavelength of Balmer Series. You should know that Balmer series falls in the visible range and so should roughly have wavelength of around 400 - 800 nm. From this you can rule out choices based on energy levels.

 

[MedPR]

I think you have to infer this from the wavelength of Balmer Series. You should know that Balmer series falls in the visible range and so should roughly have wavelength of around 400 - 800 nm. From this you can rule out choices based on energy levels.

I know that the balmer series is in the visible range, which I thought was 400-700, but according to the figure and the information stated, the balmer range went up to 652nm. So when I saw the question stating that Paschen was greater than 800nm, I didn't know if I should make the assumption that it wasn't also somewhere between 653 and 799.

The correct answer is obviously correct, I just wanted to be sure I wasn't missing something in the figure.