The number of spectral lines produced when an electron jumps from `5^(th)` orbit to `2^(nd)` orbit in the hydrogen atom is.

Explanation

To find the number of spectral lines produced when an electron jumps from the 5th orbit to the 2nd orbit in a hydrogen atom, we can use the formula:

\[ n = \frac{(n_2 - n_1)(n_2 - n_1 + 1)}{2} \]

where:
- \( n_2 \) is the higher energy level (5th orbit in this case),
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