The number of spectral lines obtain in Bohr spectrum of hydrogen atom when an electron is excited from ground level to 5th orbit is

Explanation

To determine the number of spectral lines obtained in the Bohr spectrum of a hydrogen atom when an electron is excited from the ground level (n1 = 1) to the 5th orbit (n2 = 5), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the initial and final energy levels**:
- The ground state (initial level) is n1 = 1.
- The excited state (final level) is n2 = 5.

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