Which spectral line series of the hydrogen atomic spectrum falls in the visible region of the electromagnetic spectrum?
Answer and explanation
Correct answer: D. Balmer series
- Step 1: In hydrogen, electronic transitions terminating at principal level n1 = 2 produce the Balmer series. Step 2. The wavelengths of Balmer lines fall between 400 nm and 700 nm (visible light). Answer: Balmer series. Why not the others: Lyman series (n1 = 1) falls in ultraviolet; Paschen series (n1 = 3) falls in near-infrared; Brackett series (n1 = 4) falls in infrared.
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