Enrollment No: _______________________	     Exam Seat No:_______________________
C.U.SHAH UNIVERSITY
Winter Examination-2015

Subject Name : Optics and Spectroscopy  

Subject Code :4SC05OSC1                                     Branch :B.Sc. (Physics)
			
Semester :5     Date :07/12/2015    Time :02:30 To 05:30   Marks :70
Instructions:
(1)	Use of Programmable calculator & any other electronic instrument is prohibited.
(2)	Instructions written on main answer book are strictly to be obeyed.
(3)	Draw neat diagrams and figures (if necessary) at right places.
(4)	Assume suitable data if needed.
				
Q-1		Attempt the following questions:
	(14) 	
	a)		Define: Interferometer		
	b)		How do straight line fringes occur in Michleson Interferometer?		
	c)		Define: Febry-Parot interferometer.		
	d)		Write the applications of Lummer- Gehrcke plate.		
	e)		Define: Polarization of light.		
	f)		On which factor does the index of refraction depend?		
	g)		Enlist the types of polarized light.		
	h)		Which ray is eliminated and which ray is transmitted by Nicol prism used as polarizer?		
	i)		Give only the names of quantum number.		
	j)		What is Paschen-back effect?		
	k)		Give the difference between Zeeman effect and Stark effect.		
	l)		Give the applications of Zeeman effect.		
	m)		Write only the names of perturbations on which the L-S coupling depends.		
	n)		Why the detection and measurements of Raman Spectra is difficult than other infrared spectra.		

Attempt any four questions from Q-2 to Q-8	
Q-2		Attempt all questions		
	1	Explain fringes produced in Michelson interferometer with necessary diagram.	7	
	2	Explain construction and working of Febry-Parot interferometer with its applications.	7	
Q-3		Attempt all questions		
	1	Describe Lummer-Gehreck plate with necessary diagram.	7	
	2	Explain construction and working of Michleson interferometer with diagram.	7	
Q-4		Attempt all questions		
	1	Explain Nicol-prisam with its diagram and state its principle too.	7	
	2	Explain types of polarized light with the help of figure.	7	
Q-5		Attempt all questions		
	1	Explain LCD with its neat and clean Schematic diagram.	5	
	2	Write note on J-J coupling	5	
	3	What is Space quantization? Discuss.	4	
Q-6		Attempt all questions		
	1	Explain Zeeman effect with necessary diagram.	7	
	2	Explain each quantum number with their physical interpretation.	7	
Q-7		Attempt all questions		
	1	What is L-S coupling? Explain.	7	
	2	Explain Raman effect with its application.	7	
Q-8		Attempt all questions		
	1	What is linear rigid rotor? Explain it.	5	
	2	Write a note on: Spherical top molecules.	5	
	3	Explain: Non-rigid rotor with its limitation.	4