Question

The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (e.g. line no. 5 arises from the transition from level B to A). Which of the following spectral lines will occur in the absorption spectrum?

(a) 4,5,6

(b)  1,2,3, 4, 5, 6

(c)  1,2,3

(d)  1,4,6

Answer 1

The correct option is (c)  1,2,3.

Explanation:

Absorption spectrum involves only excitation of ground level to higher level. Therefore spectral lines 1, 2, 3 will occur in the absorption spectrum.

Comments

if it involves ground level  only then answer must be 456 because how is it possible in 123 to excite from ground level