Question

For the Paschen series the value of $n_1$ and $n_2$ in the expression $\Delta E=R_H\times c[\frac{1}{n_1^2}-\frac{1}{n_2^2}]$ is:

• A. $n_1=1,n_2=2,3,\mathrm{4...}$
• B. $n_1=2,n_2=3,4,\mathrm{5...}$
• C. $n_1=3,n_2=4,5,\mathrm{6...}$
• D. $n_1=4,n_2=5,6,\mathrm{7...}$

Answer 1

The correct option is C $n_1=3,n_2=4,5,\mathrm{6...}$

For the Paschen series the value of $n_1$ and $n_2$ in the expression $\Delta E=R_H\times c[\frac{1}{n_1^2}-\frac{1}{n_2^2}]$ is $n_1=3,n_2=4,5,\mathrm{6...}$
Lyman series corresponds to transitions to $n=1$ level.
Balmer series corresponds to transitions to $n=2$ level.
Paschen series corresponds to transitions to $n=3$ level.
Pfund series corresponds to transitions to $n=4$ level.