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/
=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
Difficulty Level:
Crack NEET with Online Course - Free Trial (Offer Valid Till September 22, 2019)