Which transition in the hydrogen atom emission spectrum produces a spectral line in the visible region (Balmer series)?
Answer and explanation
Correct answer: B. From to
- Step 1: The Balmer series consists of electron transitions terminating at principal quantum level .
- Step 2: Transitions from higher levels () down to emit photons with wavelengths in the visible spectrum.
- Step 3: The transition produces the red line (approx ).
Answer
From n = 3 to n = 2.
Why not the others: 'From to ' belongs to the Lyman series (ultraviolet); 'From to ' belongs to the Paschen series (infrared); 'From to ' belongs to the Brackett series (infrared).
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