Question

The $H_β$ line of hydrogen

• A. has a wavelength 656.3 nm.
• B. has a wavelength 434.1 nm.
• C. has a wavelength smaller than that of $H_γ$ line.
• D. is emitted in the transition from the third excited state to the first excited state.

Answer 1

Answer: (D)

The wavelength of $Hβ$ line is $486.1 \,nm.$
The wavelength of $H_β$ line is greater than that of $H_γ$ line $\left(\lambda_{H_γ}= 434.1\, nm\right).$
$H_β$ line corresponds to transition from the third excited state $(n = 4)$ to the first excited state $(n = 2)$.