ELECTROMAGNETIC THEORY AND MODERN OPTICS MODEL PAPER-1

Acharya Nagarjuna University

M.Sc Physics IV Semester

Model paper              

Paper I: ELECTROMAGNETIC THEORY AND MODERN OPTICS                                 

Time:  3 hrs                                                                                                            Max.Marks:80

        

 Answer all questions

                                  

1.   a)   State  the boundary  conditions  that are to be  satisfied by  the electric  and

             magnetic  fields  at  the surface of  separation of  two  dielectric media.

      b)   Deduce the expressions for the intensity   of the reflected and transmitted wave  

             is  incident  at  such an interface.

                                                                     OR

     c)    What is double refraction and discuss the propagation of light in double  

             refracting media.

2.  a)  Explain the working of ruby laser .

     b)  Discuss the line broadening mechanism.

                                                                    OR

     c)  What are the central features of semi conductor lasers?

     d)  Derive the expression for the laser action in semiconductor laser.

3.  a)  Give the basic principles of holography and explain its importance and uses.

                                                            OR

     b)   Write in detail about Fourier transform holography

4   a)   Discuss in detail the mode theory of circular wave guides.

     b)   Discuss various types of dispersions in optical fibers.

                                                              OR

     c)   Explain the structure and advantages of a step index optical fiber

     d)   Explain the signal degradation in optical fibers.

5      Write notes on any two of the following

   a)   Retarded Potentials

   b)   Population Inversion

   c)   Speckle pattern

   d)  Attenuation in optical fibers