Physics Syllabus

PH1X01 ENGINEERING PHYSICS L T P M

(Common to all branches of B.E / B.Tech)

Unit – I Acoustics, Ultrasonics and Crystal Physics (18)

Acoustics: Classification of sound – Characteristics of musical sound – Loudness – Weber-Fechner law – Decibel – Absorption coefficient – Reverberation – Reverberation time – Sabine’s formula (growth & decay) – Factors affecting acoustics of buildings (reverberation time, loudness, focusing, echo, echelon effect, resonance and noise) and their remedies.

Ultrasonics: Ultrasonic production: Magnetostriction and piezo electric methods –Determination of velocity of ultrasonic waves (acoustic grating) – SONAR

Crystal Physics: Lattice – Unit cell – Bravais lattice – Lattice planes – Miller indices – ‘d’ spacing in cubic lattice – Calculation of number of atoms per unit cell – Atomic radius – Coordination number – Packing factor for SC, BCC, FCC and HCP structures.

Unit – II Wave Optics, Lasers and Fibre Optics (18)

Wave Optics: Michelson’s interferometer: Types of fringes – Determination of wave length of monochromatic source and thickness of a thin transparent sheet – Expressions for plane, circularly and elliptically polarized light (derivation) – Quarter and Half wave plates- Production and detection of plane, circularly and elliptically polarized light – Photo elasticity: Birefringence – Stress-optic law - Effect of a stressed model in a plane polariscope – Isoclinic and Isochromatic fringes (definitions) – Photoelastic bench.

Lasers: Einstein coefficients (A&B), Nd – YAG laser, CO₂ laser, semiconductor laser (homojunction) – Uses of lasers – Holography- Construction and Reconstruction of a hologram.

Fibre Optics: Principle and propagation of light in optical fibres – Numerical Aperture and Acceptance angle – Types of optical fibres (material, refractive index, mode) – Applications: Fibre optics communication system (block diagram only) – Fibre optic sensors (displacement sensor and pressure sensor).

Unit - III Conducting Materials & Quantum Physics (18)

Conducting Materials: Conduction in metals – Mobility and conductivity - Classical free electron theory of metals – Electrical conductivity - Thermal conductivity – Wiedmann Franz law – Lorentz number – Drawbacks of classical theory.

Quantum Physics: Black body radiation – Planck’s theory (derivation)-Deduction of Wien’s displacement law and Rayleigh - Jeans’ law from Planck’s theory – Compton effect - Theory and experimental verification - Schroedinger’s wave equation – Time independent and time dependent equations – Physical significance of wave function – Particle in a one dimensional box – Extension to 3 dimension (no derivation) – Degeneracy.

Energy Bands in Solids: Band theory of solids (qualitative) - Classification of solids into metals, semiconductors and insulators on the basis of band theory - Fermi distribution function - Effect of temperature on Fermi function - Density of energy states - Carrier concentration in metals - Energy distribution of electrons - Work function.

Unit - IV Semiconducting and Superconducting Materials (18)

Intrinsic Semiconductors: Carrier concentration in an intrinsic semiconductor – Calculation of density of holes and electrons – Fermi level and its variation with temperature – Mobility and conductivity – Determination of band gap.

Extrinsic Semiconductors: Expression for carrier concentration in n-type and p-type semiconductors – Variation of Fermi level with temperature and impurity concentration –Hall effect – Determination of Hall coefficient.

Superconducting Materials: Superconducting phenomena – Properties of superconductors – Meissner effect and Isotope effect– Type I and Type II superconductors – High T_c superconductors (qualitative) – Uses of superconductors.

Unit - V Dielectrics, New Materials and NDT (18)

Dielectrics: Electrical susceptibility - Dielectric constant – Electronic, ionic, orientational and space charge polarizations – Frequency and temperature dependence of polarization – Internal field – Claussius-Mosotti relation (derivation) - Dielectric loss – Dielectric breakdown – Uses of dielectric materials (Capacitor and Transformer).

Introduction to New Materials: Metallic glasses – Nano materials – Shape memory alloys – Bio-materials.

NDT: Liquid penetrant method – Ultrasonic flaw detection – Ultrasonic flaw detector (block diagram)– X-ray Radiography: displacement method – X-Ray Fluoroscopy– Merits and Demerits of each method.

L = 90 Periods

TEXT BOOKS

1. Avadhanulu M.N. and Kshirsagar P.G., “A Text Book of Engineering

Physics”, S.Chand & Company Ltd., 7^th Enlarged Revised Ed., 2005.

2.Gaur R. K. and Gupta S. L., “Engineering Physics”, Dhanpat Rai Publishers, New Delhi, 2001.

REFERENCE BOOKS

1. Pillai S. O., “Solid State Physics”, New Age International Publication, New Delhi, Fifth Edition, 2003.

2. Palanisamy P. K., “Physics for Engineers”, Scitech Publications (India) Pvt. Ltd., Chennai, Second Edition, 2005.

3. Arumugam M., “Engineering Physics”, Anuradha Agencies, Kumbakonam, Second Edition, 2005.

Rajendran V. and Marikani A., “Materials Science”, Tata McGraw Hill Publishing Company Ltd, New Delhi, 2004.