Atomic And Molecular Physics - Study Mode
[#51] Caesium has a nuclear spin of 7/2. The hyperfine spectrum of the d lines of the caesium atom will consist of
Correct Answer
(A) 10 lines
[#52] The degeneracy of an excited state of nitrogen atom having electronic configuration 1s 2 2s 2 2p 2 3d 1 is
Correct Answer
(B) 10
[#53] The population inversion in a two-level laser material cannot be achieved by optical pumping because
Correct Answer
(A) the rate of upward transitions is equal to the rate of downward transitions
[#54] Group I lists some physical phenomena while Group II gives some physical parameters. Match the phenomenon with the corresponding parameter Group I Group II P. Doppler broadening 1. Moment of inertia Q. Natural broadening 2. Refractive index R. Rotational spectrum 3. Lifetime of the energy level S. Total internal reflection 4. Pressure
Correct Answer
(A) P-4, Q-3, R-1, S-2
[#55] The Lande g factor for the level 3 d 3 is
Correct Answer
(B) $$frac{3}{2}$$