Number of Spectral Lines

Number of Spectral Lines

### Formula:

$$\text{Number of spectral lines}=\frac{n(n-1)}{2}$$

### Terminologies:

- n → Number of energy levels involved in transition.

- Spectral Lines → Lines obtained in atomic spectrum due to electronic transitions.

### Usage:

- Used to calculate maximum possible spectral lines when electrons return from higher energy levels.