Question

Name some spectrum lines named after the scientists who discovered them

Answer 1

Spectrum lines named after the scientists who discovered them are:

• Lyman Series: –

1. The spectral lines produced when the electron jumps from any higher stationary orbit to first stationary orbit are called the Lyman series.
2. For Lyman series, ${\mathrm{n}}_1=1$, and ${\mathrm{n}}_2=2,3,4,5\dots$

The wave number is: $\frac{1}{\mathrm{\lambda }}={\mathrm{R}}_{\mathrm{H}}\left(\frac{1}{{{\mathrm{n}}_1}^2}-\frac{1}{{{\mathrm{n}}_2}^2}\right)$

• Balmer Series: –

1. The spectral lines emitted when the electron undergoes a transition from any higher stationary orbit to the second stationary orbit with ${\mathrm{n}}_1=2$ are called the Balmer Series.
2. Here, ${\mathrm{n}}_1=2$ and ${\mathrm{n}}_2=3,4,5\dots$

• Paschen Series: –

1. The spectral lines produced when the electron undergoes a transition from any higher stationary orbit to third stationary orbit with ${\mathrm{n}}_1=3$ are called the Paschen Series.
2. Here ${\mathrm{n}}_1=3$and ${\mathrm{n}}_2=4,5,6\dots$

• Brackett Series: –

1. The spectral lines produced when the electron undergoes a transition from any higher stationary orbit to fourth stationary orbit with ${\mathrm{n}}_1=4$ are called the Bracket Series.
2. Here, ${\mathrm{n}}_1=4$ and ${\mathrm{n}}_2=5,6,7\dots$

• Pfund Series: –

1. The spectral lines produced when the electron undergoes a transition from any higher stationary orbit jumps to the fifth stationary orbit with ${\mathrm{n}}_1=5$ are called the Pfund Series.
2. Here,${\mathrm{n}}_1=5$, and ${\mathrm{n}}_2=6,7,8\dots$

• Humphrey Series: –

1. The spectral lines produced when the electron undergoes a transition from any higher stationary orbit to sixth stationary orbit with ${\mathrm{n}}_1=6$ are called the Humphrey Series.
2. Here, ${\mathrm{n}}_1=6$, and ${\mathrm{n}}_2=7,8,9\dots$