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Physics
Problem
A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength
980
A
˚
980 \text{ \AA}
980
A
˚
. The radius of the atom in the excited state, in terms of Bohr radius
a
0
a_0
a
0
, will be: [Main 11 Jan 2019 I] a.
25
a
0
25a_0
25
a
0
b.
9
a
0
9a_0
9
a
0
c.
16
a
0
16a_0
16
a
0
d.
4
a
0
4a_0
4
a
0
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