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(A) The hydrogen emission spectrum consists of several series of lines. According to the Rydberg formula,the wavenumber $\bar{
u}$ is given by $\bar{

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ultraviolet region

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(A) The hydrogen emission spectrum consists of several series of lines. According to the Rydberg formula,the wavenumber $\bar{
u}$ is given by $\bar{
u} = R_H 	imes (\frac{1}{n_1^2} - \frac{1}{n_2^2})$. For the $Lyman$ series,the electron transitions occur from higher energy levels $(n_2 = 2, 3, 4, \dots)$ to the ground state $(n_1 = 1)$. These transitions involve large energy changes,which correspond to the ultraviolet $(UV)$ region of the electromagnetic spectrum.

Lines of the $Lyman$ series of the spectrum of hydrogen are in

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