Anna University Coimbatore 2009 B.E Computer Science and Engineering 080040001-engineering physics 1 - Question Paper

PART A-(20*2=40 MARKS)
1.Mention any 4 applications of ultrasonic waves.
2.What is cavitation?Mention its use?
3.What is piezo-electric effect?
4.What is Sonogram?Mention its applications?
5.Calculate the number of photons emitted per 2nd at a wavelength 632.8nm by He-Ne laser of three mW power.
6.What is the role of Helium and Nitrogen in CO2 laser?
7.What is the principle of semiconductor laser?
8.Define the terms 'stimulated emission' and 'population inversion?
9.What is the role of cladding in an optical fibre?
10.What is splicing?Mention the 2 kinds of splicing.
11.List 4 factors that causes loss in optical fibres.
12.What is an endoscope?Mention it's use.
13.Deduce Rayleigh-Jeans legal regulations from Planck's legal regulations for radiation.
14.The wavelength of X-ray photon is doubled when it is scattered through an angle of 90 degree by a target material.Find the incident wavelength.
15.What is the physical significance of the wave function?
16.The de-Broglie wavelength of an electron is 1.226 A.What is the value of accelerating potential?
17.Draw the planes having Miller indices (110) and (111) in cubic system.
18.Determine the lattice constant for FC crystal having atomic radius 1.476 A.
19.Which crystal structure is having lowest coorination number?Give example.
20.Define the terms 'polymorphism' and 'allotropy'
PART B-(5*12=60)
21.(a)Explain the principle,construction and working of magnetostriction oscillator for the production of ultrasonics.
(b)With a neat diagram,discuss the pulse echo system.
22.Write notes on:
(a)Detection of ultrasonics
(b)Lasers in welding and cutting
23.(a)Describe the construction and working of Nd-YAG laser.
(b)Explain recording and construction of hologram.
24.(a)Discuss the light propagation in an optical fibre and find the expression for numerical aperture.
(b)Explain fibre optical communication system with a neat block diagram.
25.(a)Discuss in detail the classification of optical fibres based on mode and refractive index.
(b)Explain the fibre optic temperature sensor with a neat diagram.
26.(a)Based on quantu concepts derive the planck's radiation formula.
(b)Describe an experiment to verify Compton effect.
27.(a)Solve the schrodinger's wave formula for the particle in a 1 dimensional box.
(b)Compare SEM and TEM.
28.(a)Obtain expressions for packing factor for FCC and HCP structures.
(b)Give an account of point defects in crystals.

Earning:   Approval pending.