Question

In a sample of H-atoms, electrons make transitions from n = 5 to n =1. If all the special lines are observed, then the line having the third highest energy will correspond to :

• A. 5 $\to$ 3
• B. 4 $\to$ 1
• C. 3 $\to$ 1
• D. 5 $\to$ 4

Answer 1

Answer: (C)

3 $\to$ 1

Energy levels:

Highest: $5\to 1$

Second highest: $4\to 1$

Third highest: $3\to 1$