Quantum MechanicsElementary Theory of Scattering (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 1  5 of 6
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Question number: 1
» Quantum Mechanics » Elementary Theory of Scattering » Phase Shifts
Appeared in Year: 2014
Question
A double slit interference experiment uses a laser emitting light of two adjacent frequencies and . The minimum path difference between the interfering beams for which the interference pattern disappears is – (June 2014)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 2
» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation
Appeared in Year: 2013
Question
In the Born approximation, the scattering amplitude for the Yukawa potential,
Is given by, (in the following ) (June)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 3
» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation
Appeared in Year: 2014
Question
The scattering amplitude for the potential ; where and are positive constants, is given, in the Born approximation, by (in the following and ) – (June – 2014)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 4
» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation
Appeared in Year: 2014
Question
An electron is in the ground state of a hydrogen atom. The probability that it is within the Bohr radius is approximately equal to – (June – 2014)
Choices
Choice (4)  Response  

a.  0.32  
b.  0.60  
c.  0.16  
d.  0.90 
Question number: 5
» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation
Appeared in Year: 2012
Question
A free particle describe by a plane wave and moving in the positive z – direction undergoes scattering by a potential,
If is changed to , keeping R fixed, then the differential scattering cross section, in the Born approximation, (June)
Choices
Choice (4)  Response  

a.  Decreases to half the original value  
b.  Decreases to one fourth the original value  
c.  Increases to four times the original value  
d.  Increases to twice the original value 