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Posted Date: 11 Jul 2008      Posted By:: arya    Member Level: Silver    Points: 5 (Rs. 1)

2008 Cochin University of Science & Technology B.Tech btech 1st year engineering physics Question paper Course: B.Tech   University/board: Cochin University of Science & Technology BTECH FIRST YEAR EXAMINATION JUNE 2008 ENGINEERING PHYSICS Max marks:100 Time:3 Hrs PART A 1. a) How will you test the optical planeness of a glass plate? b) Calculate the thickness of a retardation plate, that can convert a PPL into CPL. Given wavelength =589nm, refractive indices for extraordinary rays = 1.55, refractive indices for ordinary rays = 1.54. c) Briefly explain the principle of holography. d) List any 5 applications of ultrasonic waves. e) Using Heisenberg’s uncertainty principle, prove that no electron is residing inside the nucleus. f) What are thermonuclear reactions? g) Explain the terms : Lattice Planes & Miller Indices h) What is meant by double refraction? PART B 2. a) Discuss the theory of interference in thin films. b) Give differences b/w Interference & Diffraction. OR 3. a) Explain the construction & working of a Nicol Prism. b) What are half shades? Briefly explain the working of Lorantz half shade. 4. a) Explain the terms 1) Optical Pumping 2) Stimulated emission b) Outline the principle & working of the He-Ne Laser. OR 5. a) Derive the expression for Numerical Aperture of an optical fibre. b) Explain the working of an optical fibre communication system. 6. a) What is a wave function? Give its physical significance. b) Derive time independent Schrodinger equation. OR 7. a) Explain the working of a Nuclear reactor. b) State Pauli’s exclusion principle. 8. a) State & explain Bragg’s law. b) Give the classification of semiconductors with their applications. OR 9. a) What is Meissner effect? b) Distinguish b/w type I & type II superconductors with eg. ------------------------------ Return to question paper search

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