In hydrogen atom are excited in the fifth level .The number of line that appear in the spectrum will be

Options

A. 4
B. 8
C. 10
D. 12

Explanation

To determine the number of spectral lines that appear when electrons in a hydrogen atom are excited to the fifth energy level, we can use the formula:

\[ \text{Number of lines} = \frac{n(n-1)}{2} \]

where \( n \) is the principal quantum number of the excited state.

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