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Please help me with the question . I m in urgent need for it

Please help me with the question . I m in urgent need for it 

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Grade:10

1 Answers

Shivangi Khatter
askIITians Faculty 468 Points
5 years ago
electron is moving from n = 4 to n = 1 state
no. of spectral lines = 4 * 3 / 2 = 6

answer is C

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