Question

Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?

• A. Lyman series
• B. Balmer series
• C. Paschen series
• D. Brackett series

Answer 1

The Correct Option is B

The question asks which series of transitions in the hydrogen atom spectrum fall into the visible region. This requires understanding the spectral series of hydrogen and their corresponding energy transitions.

1. The Lyman series involves transitions to and from the n=1 energy level (ground state) and results in the emission of ultraviolet radiation, not visible light.
2. The Balmer series involves transitions to and from the n=2 energy level. It is the only series that falls within the visible spectrum and results in visible light. The transitions in this series involve higher energy levels (e.g., n=3,4,5,\ldots) transitioning to n=2.
3. The Paschen series involves transitions to and from the n=3 energy level, producing infrared radiation, which is not visible to the naked eye.
4. The Brackett series involves transitions to and from the n=4 energy level, which also results in infrared emissions.

Given the above explanations, the correct answer to the question is the Balmer series, as it involves transitions that emit visible light.