DISTANCE EDUCATION
M.Sc. (Physics) DEGREE EXAMINATION, MAY 2018.
ELECTROMAGNETIC THEORY
(2008 onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
× 20 100)
1. Discuss propagation of plane electromagnetic waves
in a free space and non conducting isotropic media.

Write the Maxwell's equations in differential
form.
State and explain Poynting vector.
2. Discuss refraction of electromagnetic wave at the
interface of non-conducting media.
Obtain the boundary conditions at the surface of
discontinuity.
What is total internal reflection? Explain
3. Discuss reflection and transmission coefficients
at an interface between two non-conducting media.

Obtain Fresnel's equations.
State and explain Brewster's law.
Sub. Code
14
DE-4060
2
Ws3
4. Write a detailed note on theory of scattering of
electromagnetic waves.
Explain dispersion in solids and liquids
Obtain Lorentz formula.
5. Obtain the Clasusius Mossotti relation.
What do you mean by normal and anomalous
dispersion? Explain.
Briefly explain coherence and incoherence of
scattering light.
6. Describe modes of propagation in rectangular and
cylindrical wave guides.
Explain the operation of Klystron.
Briefly explain the generation of microwaves.
7. Explain the theory of resonant cavities in
TE modes.
Explain the operation of magnetron.
What are Gunn diodes? Explain its operation.
8. Write a detailed note on charged particles in electric
and magnetic fields.
Discuss magnetohydrodynamics.
What are Plasma waves? Explain.
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