Engineering Physics | Unit 1 – 5 Notes [2024 Pat]

Course Objectives:

To teach students basic concepts and principles of physics, relate them to laboratory experiments
and their applications

Examination Scheme for Engineering Physics 2024 Pattern

  1. Unit Test 12 Marks Units 1 & Unit 2 (6 Marks/Unit)
  2. Assignments / Case Study 12 Marks Units 3 & Unit 4 (6 Marks/Unit)
  3. Seminar Presentation / Open Book Test/ Quiz (06 Marks Unit 5)

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Unit 1 – 2

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Syllabus

Unit I: Fundamentals of Photonics (08 Hours)

  • Laser:
    • Spontaneous and stimulated emission
    • Population inversion, pumping
    • Active medium & active center, resonant cavity
    • Characteristics of lasers
    • COâ‚‚ laser: construction and working
    • Engineering applications of lasers (IT, medical, industry)
  • Holography:
    • Recording, reconstruction, applications
  • Optical Fibers:
    • Critical angle, acceptance angle, acceptance cone, numerical aperture
    • Total internal reflection and propagation of laser
    • Classification of optical fibers: Single mode & multimode, step index & graded index
    • Attenuation: attenuation coefficient, causes of attenuation
    • Advantages of optical fiber communication
    • Numerical problems on parameters of optical fiber

Unit II: Quantum Physics (08 Hours)

  • de Broglie Hypothesis of Matter Waves:
    • de Broglie wavelength for a particle accelerated by KE “E” and a charged particle accelerated by PD “V”
    • Properties of matter waves
  • Wave Function:
    • Wave function and probability density
    • Mathematical conditions for wave function
    • Problems on de Broglie wavelength
  • Schrödinger’s Equations:
    • Need and significance of Schrödinger’s equations
    • Schrödinger’s time-independent and time-dependent equations
  • Energy of a Particle in a Rigid Box:
    • Related numerical problems
  • Quantum Mechanical Tunneling:
    • Alpha particle decay
    • Principle and applications of STM (Scanning Tunneling Microscopy)
  • Principles of Quantum Computing:
    • Concept of qubit, superposition and entanglement
    • Comparison of classical & quantum computing
    • Potential applications of quantum computing

Unit III: Wave Optics (08 Hours)

  • Interference:
    • In thin film of uniform thickness
    • Conditions of maxima and minima for reflected system
    • Conditions for maxima and minima for wedge-shaped film (qualitative)
    • Engineering applications: ARC, determination of optical flatness
  • Polarization:
    • Types: Unpolarized, Polarized, PPL, CPL, and EPL
    • Malu’s law and related numerical problems
    • Double refraction: Geometry of calcite crystal, Huygens’ theory
  • Engineering Applications of Polarization:
    • LCD, communication & radar, 3D movies (recording, projection)
  • Numerical Problems:
    • Thin film and wedge-shaped film

Unit IV: Semiconductor Physics and Ultrasonics (08 Hours)

  • Semiconductor Physics:
    • Valence band, conduction band, band gap energy
    • Classification of solids on the basis of band theory
    • Fermi level and Fermi energy for metal
    • FD distribution function and its temperature dependence
    • Position of Fermi level in intrinsic semiconductors (derivation)
    • Fermi level for extrinsic semiconductors
    • Working of PN junction diode on the basis of Fermi energy
  • Solar Cell:
    • Principle, working, IV-characteristics
    • Efficiency and fill factor
    • Measures to improve efficiency
    • Advantages and applications in environmental sustainability
  • Hall Effect:
    • Derivation for Hall voltage and Hall coefficient
    • Related numerical problems
  • Ultrasonics:
    • Characteristics and properties of ultrasonic waves
    • Generation of ultrasonic waves by inverse piezoelectric effect (using transistor)
    • Engineering applications: thickness measurement, flaw detection
    • Related numerical problems

Unit V: Physics of Nanoparticles and Superconductivity (08 Hours)

Electronics, principle of Maglev train

Nanoparticles:

Quantum confinement and its effect on properties of nanoparticles

Synthesis methods: ball milling and Physical Vapor Deposition

Properties of nanoparticles (optical, electrical, mechanical, magnetic)

Applications of nanotechnology: Electronics (GMR effect and its application in read-write head of HDD), automobiles, environmental & energy, medical field (targeted drug delivery)

Superconductivity:

Temperature dependence of resistivity, critical magnetic field, critical current

Meissner effect and perfect diamagnetism

Type I and Type II Superconductors

Numerical problems on critical magnetic field

Formation of Cooper pairs

DC and AC Josephson effect

SQUID: working principle and applications

Engineering Applications: