PH8151 – NOTES & QP
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PH8151 – SYLLABUS
UNIT I PROPERTIES OF MATTER
Elasticity — Stress-strain diagram and its uses — factors affecting elastic modulus and tensile strength. Torsional stress and deformations — twisting couple — torsion pendulum: theory and experiment — bending of beams. Bending moment — cantilever: theory and experiment. Uniform and non-uniform bending: theory and experiment — I-shaped girders — stress due to bending in beams.
UNIT II WAVES AND FIBER OPTICS
Oscillatory motion — forced and damped oscillations: differential equation and its solution — plane progressive waves — wave equation. Lasers : population of energy levels, Einstein?s A and B coefficients derivation — resonant cavity, optical amplification (qualitative) — Semiconductor lasers:
homojunction and heterojunction — Fiber optics: principle, numerical aperture and acceptance angle — types of optical fibres (material, refractive index, mode) — losses associated with optical fibers — fibre optic sensors: pressure and displacement.
UNIT III THERMAL PHYSICS
Transfer of heat energy — thermal expansion of solids and liquids — expansion joints — bimetallic strips — thermal conduction, convection and radiation — heat conductions in solids — thermal conductivity — Forbe?s and Lee?s disc method: theory and experiment — conduction through compound media (series and parallel) — thermal insulation — applications: heat exchangers, refrigerators, ovens and solar water heaters.
UNIT IV QUANTUM PHYSICS
Black body radiation — Planck?s theory (derivation) — Compton effect: theory and experimental verification — wave particle duality — electron diffraction — concept of wave function and its physical significance — Schrödinger?s wave equation — time independent and time dependent equations — particle in a one-dimensional rigid box — tunnelling (qualitative) — scanning tunnelling microscope.
UNIT V CRYSTAL PHYSICS
Single crystalline, polycrystalline and amorphous materials — single crystals: unit cell, crystal systems, Bravais lattices, directions and planes in a crystal, Miller indices — inter-planar distances — coordination number and packing factor for SC, BCC, FCC, HCP and diamond structures — crystal imperfections: point defects, line defects — Burger vectors, stacking faults — role of imperfections in plastic deformation — growth of single crystals: solution and melt growth techniques.