Question

hello guys can you plz help me




Hydrogen atom in ground state is excited by a
monochromatic radiation of a = 975 ×10^10. Number of
spectral lines in the resulting spectrum emitted will be
(2) 3
(b) 2
(c) 6
(d) 10​

Answer 1

Answer:

i think it should be 10 the answer

Answer 2

Answer:

Energy of the photon, E=

λ

hc

=

97.5

1240

=12.75eV

This energy is equal to energy gap between n=1(−13.6) and n=4(−0.85).

So by this energy, the electron will excite from n=1 to n=4.

When the electron will fall back, numbers of spectral lines emmitted =

2

n(n−1)

=

2

(4)(4−1)

=6