Select the one among the following transitions in a hydrogen atom which gives an absorption line of the lowest frequency:
Correct answer: C. n=4 to n=6
- A. n=1 to n=3
- B. n=2 to n=3
- C. n=4 to n=6
- D. n=3 to n=4
Explanation
The frequency of an absorption line is proportional to the energy difference between the orbits (ΔE = hf). The energy gaps between Bohr orbits decrease as n increases. The transition from n=4 to n=6 represents the smallest energy jump among the choices, thus corresponding to the lowest frequency.
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