Engineering Physics is designed to cater to the needs of first year undergraduate engineering students of Anna University. Written in a lucid style, this book assimilates the best practices of conceptual pedagogy, dealing at length with various topics such as Crystal Physics, Properties of matter, Thermal Physics, Quantum Physics, Fibre optics, Lasers, Acoustics, Ultrasonics.

nexusstc/Engineering Physics/84653c5865b99c102c64d0649582ebdd.pdf

lgli/Engineering Physics (Naidu), 2e.pdf

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zlib/Physics/General Courses/S. Mani Naidu/Engineering Physics : Anna-USDP_5440892.pdf

Ramesh Subbarao

India, India

lg2499791

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Cover 1
Contents 6
Preface 10
Acknowledgement 12
About the Author 14
Road Map to the Syllabus 16
Chapter 1: Crystal Physics 18
1.1 Introduction 18
Distinction between crystalline and amorphous solids 18
1.2 Space Lattice (or) Crystal Lattice 19
1.3 Unit Cell and Lattice Parameters 20
1.4 Crystal Systems and Bravais Lattices 21
1.5 Crystal Planes, Directions and Miller Indices 25
1.6 Distance of Separation Between Successive hkl Planes 27
1.7 Structure and Packing Fractions of Simple Cubic [SC] Structure 30
1.8 Structure and Packing Fractions of Body-Centred Cubic Structure [BCC] 31
1.9 Structure and Packing Fractions of Face-Centred Cubic [FCC] Structure 32
1.10 Hexagonal Close Pack (HCP) Structures 33
1.11 Diamond Cubic Structure 36
1.12 Graphite Structure 37
1.13 Calculation of Lattice Constant 38
1.14 Crystal Growth Techniques 39
Solution 39
Bridgman Method 39
Czochralski Method 39
Vapour Diffusion 41
Formulae 41
Solved Problems 42
Multiple-Choice Questions 45
Answers 49
Review Questions 49
Chapter 2: Properties of Matter and Thermal Physics 52
Elasticity 52
2.1 Introduction 52
Longitudinal or Tensile Strain 52
Shearing Strain 53
Bulk (or Volume) Strain 53
Stress 54
2.2 Hook's Law 54
2.3 Stress-Strain Diagram 55
2.4 Poisson's Ratio 55
2.5 Types of Moduli of Elasticity 56
2.6 Relationship Between Three Moduli of Elasticity 57
2.7 Factors Affecting Elasticity 60
2.8 Bending Moment of a Body 60
2.9 Depression of a Cantilever 62
2.10 I-beam [or I-girders] 65
2.11 Young's Modulus by Uniform Bending 66
Thermal Physics 68
2.12 Introduction and Modes of Heat Transfer 68
2.13 Thermal Conductivity 68
2.14 Newton's Law of Cooling 70
2.15 Linear Heat Flow Through a Rod 71
2.16 Lee's Disc Method 74
2.17 Radial Heat Flow 75
2.18 Thermal Conductivity of Rubber Tube 76
2.19 Conduction Through Compound Media Series and Parallel 78
Formulae 80
Solved Problems 81
Review Questions 84
Chapter 3: Quantum Physics 86
3.1 Introduction 86
3.2 Black Body Radiation 86
3.3 Planck's Radiation Law 88
Average Energy of an Oscillator 88
3.4 Derivation of Diff erent Laws from Planck's Radiation Law 90
3.5 Compton Effect 92
3.6 Waves and Particles—de Broglie Hypothesis—Matter Waves 93
Matter Waves 95
Properties of Matter Waves 95
3.7 Experimental Study of Matter Waves 96
3.8 Schrödinger's Time-Independent Wave Equation 99
3.9 Physical Significance of the Wave Function 102
3.10 Particle in a Potential Box 103
Particle in a One-dimensional Box [or One Dimensional Potential Well] 103
3.11 Electron Microscope 108
3.12 Scanning Electron Microscope 109
3.13 Transmission Electron Microscope [TEM] 110
Construction 110
Working 110
Formulae 111
Solved Problems 112
Multiple-Choice Questions 118
Answers 121
Review Questions 121
Chapter 4: Acoustics and Ultrasonics 124
4.1 Introduction to Acoustics of Buildings 124
4.2 Classification of Sound 124
4.3 Decibel (dB) 125
4.4 Weber–Fechner Law 125
Derivation of Weber–Fechner Law 126
4.5 Sabine's Empirical Formula for Reverberation Time 126
4.6 Sabine's Reverberation Theory for Reverberation Time 127
4.7 Absorption Coefficient of Sound and its Measurement 131
4.8 Factors Affecting Architectural Acoustics and their Remedies 132
4.9 Magnetostriction Effect, Piezoelectric Effect and Production of Ultrasonic Waves 134
Magnetostriction Effect 134
Piezoelectric Effect 135
Production of Ultrasonic Waves 135
4.10 Ultrasonic Diffractometer and Determination of Velocity of Ultrasonics in a Liquid 137
4.11 Non-destructive Testing Using Ultrasonics 139
Inspection Methods—Pulse Echo Testing Technique 139
Different types of scans 140
Sonogram 143
Formulae 144
Solved Problems 144
Multiple-Choice Questions 145
Answers 147
Review Questions 147
Chapter 5: Photonics and Fibre Optics 150
5.1 Introduction to Lasers (Photonics) 150
5.2 Spontaneous and Stimulated Emission 150
5.3 Einstein's A and B Coefficients Derivation 152
5.4 Population Inversion 154
5.5 Neodymium YAG Laser 156
5.6 Carbon Dioxide Laser 158
Introduction 158
Construction 159
Working 160
5.7 Semiconductor Lasers 162
5.8 Applications of Lasers 165
In Communications 165
Industrial Applications 165
Medical Applications 165
Military Applications 166
In Computers 166
In Thermonuclear Fusion 166
In Scientific Research 166
5.9 Introduction to Fibre Optics 167
5.10 Principle of Optical Fibre, Acceptance Angle and Acceptance Cone 167
Principle 167
Acceptance Angle and Acceptance Cone 168
5.11 Numerical Aperture (NA) 169
Expression for Numerical Aperture (NA) 169
Condition for Light Propagation in the Fibre 171
5.12 Step Index Fibres and Graded Index Fibres—Transmission of Signals in Them 171
5.13 Attenuation in Optical Fibres 174
5.14 Dispersion in Optical Fibres 177
Material Dispersion and Pulse Broadening in Optical Fibres 177
Modal Dispersion 177
Intermodal Dispersion 177
5.15 Optical Fibres in Communication 177
5.16 Advantages of Optical Fibres in Communication 179
5.17 Fibre Optic Sensing Applications 179
Displacement Sensors 180
Liquid Level Sensor 181
Temperature and Pressure Sensor 181
Chemical Sensors 182
5.18 Applications of Optical Fibres in Medical Field 182
Formulae 183
Solved Problems 183
Multiple-Choice Questions 188
Answers 193
Review Questions 193
Appendix A 198

2020-04-09