Anna University of Technology Tirunelveli 2010 B.E Computer Science and Engineering Ph 13-engineering physics-1 - Question Paper

PART A-(10*2=20 MARKS)
1.How are ultrasonic waves detected by thermal method?
2.What is Cavitation?
3.What is the function of helium in He-Ne laser?
4.Mention the various pumping ethods used in laser for achieving population inversion?
5.Find the numerical aperture of an optical fibre having a core refractive index of 1.55 and cladding refractive index of 1.55 and cladding refractive index of 1.50.
6.What is splicing?
7.State Rayleigh Jean's legal regulations.What are its limitations?
8.Give the physical significance of the wave function.
9.Sketch the planes in a cubic lattice corresponding to Miller indices(111) and (100).
10.What are Schottky defects?
PART B-(10*2=20 MARKS)
11.(a)(i)What is piezoelectric effect?Describe the piezoelectric method of producing ultrasonic waves.
(ii)Explain how ultrasonic waves are used in the industrial applications of drilling and soldering.
Or
(b)(i)What is acoustic grating?Explain the existenc of stimulated emission using Einstein's theory.
(Ii)Discuss about the application of ultrasonic waves in NDT.
12.(a)(i)What is stimulated emission?Explain the existance of stimulated emission using Einstein's
theory?
(ii)Describe the construction and working of ND-YAG laser.
Or
(b)(i)Explain the working of CO2 laser using energy level diagram.
(ii)Explain with neat diagram the recording and reconstruction of hologram.
13.(a)(i)Describe the classification of optical fibres based on refractive index profile and propagation
modes.
(ii)Give an account of fiber optic temperature sensor and fiber optic displacement sensor.
Or
(b)(i)Explain the working of an optic fiber communication system using a block diagram.Also
mention the light sources and detectors used.
(ii)Explain the propagation of light through the optical fiber and find an expressin for
numerical aperture and acceptance angle.
14.(a)(i)Discuss about Compton effect and derive the expression for Compton shift.
(ii)Describe the construction and working of scanning electron microscope.
Or
(b)(i)Deduce schrodinger's time dependent and time independent equations.
(ii)Describe the construction and working of transmission electron microscope.
15.(a)(i)What are Bravais lattices?Describe using diagram of unit cell the various Bravais lattices and
their grouping into the 7 crystal systems.
(ii)Describe the arrangement of atoms inFCC and HCP structures and show that both these
structures.
Or
(b)(i)Explain diamond cubic structure and find its atomic packing factor.Also define the
arrangement of atoms in ZnS.
(ii)What are line defects?Explain edge dislocation using a diagram.

Earning:   Approval pending.