Paper: CSIR-NET June 2016 · Subject: Physical Chemistry · Chapter: Molecular Spectroscopy · Topic: Molecular Spectroscopy – General · Marks: 2 · Difficulty: Medium
Upon application of a weak magnetic field, a line in the microwave absorption spectrum of rigid rotor splits into 3 lines. The quantum number (J) of the rotational energy level from which the transition originates is
(a)0
(b)1
(c)2
(d)3
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
J = 0 → 1 splits into three lines (M_J = 0, ±1 of the upper level); higher J values would give more components.