Hydrogen atom is bombarded with electrons accelerated through a potential difference of V, which causes excitation of hydrogen atoms. If the experiment is being performed at T = 0 K, the minimum potential difference needed to observe any Balmer series lin

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Solution

Q.
Hydrogen atom is bombarded with electrons accelerated through a potential difference of V, which causes excitation of hydrogen atoms. If the experiment is being performed at T = 0 K, the minimum potential difference needed to observe any Balmer series lines in the emission spectra will be $\frac{α}{10} V$ , where $α$ = _______ . [2024]

Ans.
(121) $Δ E_{\min} = E_{3} - E_{1}$

$= - 1.51 - (- 13.6)$

$Δ E_{\min} = 12.09 eV$

$V_{\min} = 12.09 volt = \frac{α}{10}$

$α = 120.9 = 121$

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