The wavelength of $H_{\alpha}$ line of Balmer series is $X \ \mathring{A}$. What is the wavelength of $H_{\beta}$ line of Balmer series?

  • A
    $X \frac{80}{108} \ \mathring{A}$
  • B
    $X \frac{108}{80} \ \mathring{A}$
  • C
    $\frac{1}{X} \frac{80}{108} \ \mathring{A}$
  • D
    $\frac{1}{X} \frac{108}{80} \ \mathring{A}$

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