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11
DE-4662
DISTANCE EDUCATION
M.Phil. (Physics) DEGREE EXAMINATION,
DECEMBER 2008.
Non–Semester
RESEARCH METHODOLOGY AND PROGRAMMING
(2006 Batch)
Time : Three hours
Maximum : 100 marks
Answer any FIVE of the following.
(5 × 20 = 100)
1.
Discuss the preparation of manuscript for presenting a
paper in scientific seminars.
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2.
Evaluate
dx
1 x
by dividing the range into eight equal
2
parts using trapezoidal rule and Simpson’s
1
rule.
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3.
X  0.1, 0.2 ,
Obtain
the
values
of
y
at
Using
Runge–Kutta method of (a) Second and (b) Fourth order for
dy
  y , given y0  1 .
the differential equation
dx
4.
Give the programs for the following in 8085.
(a)
Temperature monitoring system.
(b)
Interfacing of stepper motor.
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5.
Discuss the pin configuration and operating modes of
8086.
6.
7.
Give short notes on the following with examples.
(a)
Arithmetic Operators
(b)
Conditional Operators.
(c)
Control Statements.
Discuss in detail about data files in C language.
8.
The annual examination results of 100 students are
tabulated as follows :
Roll No.
Subject 1
Subject 2
Subject 3
Write a program to read the data and determine the
following :
(a)
Total marks obtained by each student.
(b)
The student who obtained the highest total marks.
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DE–4663
DISTANCE EDUCATION
M.Phil. DEGREE EXAMINATION, DECEMBER 2008.
Non–Semester
Physics
ADVANCED PHYSICS
(2006 batch)
Time : Three hours
Maximum : 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
1.
Show that the Dirac’s field can be quantized only by
using Fermi– Dirac statistics.
2.
Quantize the electromagnetic field and generalise that
the photon carries discrete amount of energy and momentum.
3.
(a)
Explain in detail the Feynman diagrams.
(b)
Discuss
sp 3
and
sp 2
hybridization
examples.
4.
(8)
with
(12)
(a)
Discuss about dye lasers and chemical lasers.
(b)
Explain Q-switching.
(5)
(c)
Explain about mode locking in laser amplifiers.
(5)
3
(10)
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5.
(a)
Explain optical filters in detail and its basic
characteristics.
(10)
(b) Discuss about optical isolators in lasers and about
fiber tools.
(10)
6.
(a)
Explain
time
division
multiplexing,
frequency
division multiplexing, wavelength division multiplexing to
carry signals through optical fiber.
7.
(b)
Discuss about attenuation in optical fibers.
(a)
Mention the basic advantages of optical fiber as
wave guide over conventional metallic wave guide.
(b)
(a)
(10)
(10)
Explain how pin or p  n photodiode is used in a
fiber- optic receiver.
(b)
(8)
Discuss the different scattering losses in SiO2 fiber
at the operating wavelengths.
8.
(12)
(6)
Discuss the basic principles of optical detection. (14)
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131 A
DE–4664
DISTANCE EDUCATION
M.Phil. (Physics) DEGREE EXAMINATION,
DECEMBER 2008.
Non-Semester
MATERIALS PHYSICS
(2006 batch)
Time : Three hours
Maximum : 100 marks
Answer any FIVE questions.
All questions carry equal marks.
(5  20 = 100)
1.
Obtain Kirlwood-Frohlich equation. Explain Kirlswood
correlation factor for pure and liquid mixtures.
2.
Discuss the basics of impedance measurements with the
relevant expressions. Draw the core-core plot for an RC circuit
and explain its salient features.
3.
Define the terms ‘‘Directive relaxation’’ and ‘‘Directive
loss’’. Derive Eyrings rate theory and mention its uses and
limitations.
4.
Explain the methods of measurement of directive
constant for low loss and high loss liquids. Give the necessary
theory.
5.
Explain the various IR group frequencies with a typical
IR spectrum. Discuss the effect of dipole transition derivatives
in the integrated intensifies of IR spectrum.
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6.
On the basis of quantum mechanical model obtain
potential curves for H-bonded systems. Write a note on its
application to biological systems.
7.
What are LB films? How does it differ from an ordinary
this film? Discuss in detail the uses (atleast two) of LB films in
device fabrication.
8.
Write notes on the following :
(a)
Optical properties of LB films.
(b)
Dielectric properties of LB films.
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132 B
DE–4665
DISTANCE EDUCATION
M.Phil. (Physics) DEGREE EXAMINATION,
DECEMBER 2008.
Non-Semester
CRYSTAL GROWTH
(2006 batch)
Time : Three hours
Maximum : 100 marks
Answer any FIVE questions.
All questions carry equal marks.
(5  20 = 100)
1.
Define space lattice. Draw neatly the crystal planes (100),
(110) and (111). Discuss the crystal symmetry operations such
as Rotation, Mirror symmetry and Inversion with necessary
diagrams.
2.
What do you mean by crystallization? Classify and
explain briefly the methods available for crystal growth.
3.
What are the basic requirements for the growth of
crystals from solutions? Explain the flow cooling method of
growing single crystals with an example.
4.
List the advantages of gel growth technique. Discuss the
methods of growing single crystals by gel growth technique
with suitable examples.
5.
Explain in detail the Bridgeman method of growing
single crystals with necessary diagrams. List its merits and
demerits.
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6.
Discuss the control mechanism which provide complete
control of the crystal pulling process. Describe briefly the liquid
encapsulation in crystal growth process.
7.
What is physical vapour deposition? Explain the
mechanism of growing single crystals by molecular beam
method. Is it possible to grow all materials as single crystals
using this technique? Explain.
8.
Write notes on the following :
(a)
Theory of crystal growth
(b)
Chemical vapour deposition.
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DE–4666
133 C
DISTANCE EDUCATION
M.Phil. (Physics) (NS) DEGREE EXAMINATION,
DECEMBER 2008.
APPLIED SPECTROSCOPY
(2006 Batch)
Time : Three hours
Maximum : 100 marks
Answer any FIVE questions.
All questions carry equal marks.
1.
Explain the functions of radiation detectors. Describe the
construction and working of a photo multiplier tube. State its
merits. Discuss the design of interference filters.
2.
State and explain the factors involved in the performance
of a monochromator. Describe the Littrow method of mounting
prism. Give the equation for its resolving power and state the
advantages of this method.
3.
Explain nebulisation principle. State the difference
between atomic absorption and flame emission Spectroscopy.
Describe the operation of single beam and double beam atomic
absorption spectrometers.
4.
List
and
explain
the
various
atomic
emission
spectroscopic sources. Describe the photographic detectors.
Explain microprobes method of analysis.
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5.
What is meant by infrared spectroscopy? Write a detailed
note on infrared radiation sources. Describe the different
thermal detectors used for the analysis of infrared radiation.
Give the merits of thermal detection methods
6.
Describe the different sampling techniques used in
infrared radiation. Compare Raman and infrared spectroscopy.
Discuss the polarization measurements.
7.
Explain how characteristic x-ray spectra is analysed by
an x-ray fluorescence spectrometer. Describe the analytical
applications of it.
8.
Explain in detail how the pulsed Fourier transform NMR
technique helps in identifying internal rotations and segmental
motions of nuclides. Write a note on nuclear magnetic energy
level.
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