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NEET - 2014

Hydrogen atom in ground state is excited by a monochromatic radiation of λ=975Å. Number of spectral lines in the resulting spectrum emitted will be

(a)3

(b)2

(c)6

(d)10

Energy provided to the ground state electron

=hc/λ

=6.6x10-34x3x108/975x10-10

=6.6x3/975 x 10-16

=0.020x10-16=2 x 10-18

=20x10-19/1.6x10-19 eV

=20/1.6eV

=12.5eV

It means the elctron is jump to n=3 from n=1 The number of field lines possible from n=3 to n=1 is 2.
n→3, to n→2 to n→1

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