A hydrogen atom, initially in the ground state, is excited by absor...

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A hydrogen atom, initially in the ground state, is excited by absorbing a photon of wavelength \( 980 \AA \).
\( \mathrm{P} \) The radius of the atom in the excited state, in terms

W of Bohr radius \( a_{0} \), will be ( \( \left.h c=12500 \mathrm{eV}-\AA\right) \)
(a) \( 9 a_{0} \)
(b) \( 16 a_{0} \)
(c) \( 4 a_{0} \)
(d) \( 25 a_{0} \)
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