Question

The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission $($example - line number $5$ arises from the transition level $B$ to $A$$)$. Which of the following spectral lines will also occur in the absorption spectrum?

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

Answer 1

The correct option is C $1,2,3$

The absorption lines are obtained when the electron jumps from excited states to the ground state $(n=1)$.

Thus, only $1,2\text{and}3$ lines are obtained in absorption spectrum.

Hence, option $\left(C\right)$ is correct.

Why this question? Key Concept: The transitions from the excited state to ground state occur in the absorption spectrum.