Consider a hydrogen atom with its electron in the \( n^{\text {th }...

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Consider a hydrogen atom with its electron in the \( n^{\text {th }} \) orbital. An electromagnetic radiation of wavelength
\( \mathrm{P} \) \( 90 \mathrm{~nm} \) is used to ionize the atom. If the kinetic energy

W of the ejected electron is \( 10.4 \mathrm{eV} \), then the value of \( n \) is \( (h c=1242 \mathrm{eV} \mathrm{nm}) \)
(1) 1
(2) 2
(3) 4
(4) 6
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