Question

The figure indicates the energy level diagram for the origin of six spectral lines in the emission spectrum (e.g. line no. 5 arises from the transition from level B to X). Which of the following spectral lines will not occur in the absorption spectrum?

• A. 1, 2, 3
• B. 3, 2
• C. 4, 5, 6
• D. 3, 2, 1

Answer 1

Answer: (C)

4, 5, 6

The spectral lines 4, 5 and 6 will not occur in the absorption spectrum. They are for the transitions from the higher excited state to lower excited state but not to ground state.

The transitions from the excited state to ground state will occur in the absorption spectrum.

Hence, the correct option is $C$