Atomic & Molecular Physics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 11  14 of 19
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Question number: 11
» Atomic & Molecular Physics » Diatomic Molecules » Vibrational
Appeared in Year: 2012
Question
A system has two normal modes of vibration, with frequencies and . What is the probability that at temperature T, the system has an energy less than ?
[In the following and Z is the partition function of the system]
(June)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 12
» Atomic & Molecular Physics » LS & JJ Couplings
Appeared in Year: 2012
Question
The spectral line corresponding to an atomic transition from states splits in a magnetic field of 1 KG into three components separated by . If the zero field spectral line corresponding to , what is the g – factor corresponding to the state? (You may use ) (June)
Choices
Choice (4)  Response  

a. 


b. 


c.  2 

d.  1 

Question number: 13
» Atomic & Molecular Physics » LS & JJ Couplings
Appeared in Year: 2011
Question
If the hyperfine interaction in an atom is given by , where and denote the electron and proton spins, respectively, the splitting between the and state is – (December)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 14
» Atomic & Molecular Physics » Relativistic Corrections for Energy Levels of Hydrogen Atom
Appeared in Year: 2011
Question
The ratio of intensities of the and lines of sodium at high temperature – (December)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

