Atomic And Molecular Physics - Study Mode
[#56] In a Raman scattering experiment, light of frequency $$
u $$ from a laser is scattered by diatomic molecules having the moment of inertia $$I$$. The typical Raman shifted frequency depends on
Correct Answer
(C) only $$I$$
[#57] CO 2 molecule has the first few energy levels uniformly separated by approximately 2.5 meV. At a temperature of 300 K, the ratio of the number of molecules in the 4 th excited state to the number in the 2 nd excited state is about
Correct Answer
(D) 0.9
[#58] The separation between the first stokes and corresponding anti-stokes Iines of the rotational Raman spectrum in terms of the rotational constant B
Correct Answer
(D) 12B
[#59] A vibrational-electronic spectrum of homonuclear binary molecules, involving electronic ground state ε'' and excited ε', exhibits a continuum at $$overline v $$ cm -1 . If the total energy of the dissociated atoms in the excited state exceeds the total energy of the dissociated atoms in the ground state by E ex cm -1 , then dissociation energy of the molecule in the ground state is
Correct Answer
(C) $$left( {overline v - {E_{ex}}}
ight)$$
[#60] Two states of an atom have definite parities. An electric dipole transition between these states is
Correct Answer
(C) allowed if the two states have opposite parities