Physics · 2019
JEE Main · 11 January 2019, Shift 1 · Q26
A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength 980. The radius of the atom in the excited state, in…
A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength $\displaystyle 980 \AA$. The radius of the atom in the excited state, in terms of Bohr radius $\displaystyle \mathrm{a}_0$, will be :
$$(\mathrm{hc}=12500 \mathrm{eV}-\AA)
$$
Official answer
(3)
$\displaystyle 16 a_0$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.