Identify the sets of electronic transitions associated with release of energy and absorption of energy.

n = 4 to n = 1; n = 2 to n = 1

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n = 4 to n = 3; n = 4 to n = 2

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n = 3 to n = 5; n = 2 to n = 3

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n = 3 to n = 2; n = 1 to n = 2

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Solution

The correct option is D n = 3 to n = 2; n = 1 to n = 2
When electrons fall from higher energy level to lower energy level, energy is emitted. Also when electrons jump from lower energy level to higher energy level, energy is absorbed. Thus option (D) is correct.

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n - \frac{n (n - 1) (n - 2)}{⌊ 3} \cdot 3 + \frac{n (n - 1) (n - 2) (n - 3) (n - 4)}{⌊ 5} \cdot 3^{2} - . . . . .,

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