The visible emission lines observed by Balmer all involved nf = 2.
(a) Explain why only the lines with nf = 2were observed in the visible region of the electromagnetic spectrum.
(b) Calculate the wavelengths of the first three lines in the Balmer series-those for which ni = 3,4, and 5-and identify these lines in the emission spectrum shown in Figure 6.11.

Transcribed Image Text:

400 450 500 550 600 650 700 nm Ne 400 45 500 550 700 nm 600 650