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Consider the following spectral lines for atomic hydrogen: A. First line of Paschen series B. Second line of Balmer series C. Third line of Paschen series D. Fourth line of Bracket series The correct arrangement of the above lines in ascending order of energy is:
- D < C < A < B
- A < B < C < D
- C < D < B < A
- D < A < C < B
Correct answer: D < A < C < B
Solution
The energy of spectral lines in hydrogen is determined by the transitions between energy levels, with higher transitions corresponding to higher energy. The Bracket series has the lowest energy transitions, followed by the Paschen series, and the Balmer series has the highest energy transitions among the options given.
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