CHAPTER NINE
RAY OPTICS AND OPTICAL INSTRUMENTS
9.1 Introduction 309
9.2 Reflection of Light by Spherical Mirrors 310
9.3 Refraction 316
9.4 Total Internal Reflection 319
9.5 Refraction at Spherical Surfaces and by Lenses 323
9.6 Refraction through a Prism 330
9.7 Some Natural Phenomena due to Sunlight 332
9.8 Optical Instruments 335
CHAPTER TEN
WAVE OPTICS
10.1 Introduction 351
10.2 Huygens Principle 353
10.3 Refraction and Reflection of Plane Waves using Huygens Principle 355
10.4 Coherent and Incoherent Addition of Waves 360
10.5 Interference of Light Waves and Young’s Experiment 362
10.6 Diffraction 367
10.7 Polarisation 376
CHAPTER ELEVEN
DUAL NATURE OF RADIATION AND MATTER
11.1 Introduction 386
11.2 Electron Emission 387
11.3 Photoelectric Effect 388
11.4 Experimental Study of Photoelectric Effect 389
11.5 Photoelectric Effect and Wave Theory of Light 393
11.6 Einstein’s Photoelectric Equation: Energy Quantum of Radiation 393
11.7 Particle Nature of Light: The Photon 395
11.8 Wave Nature of Matter 398
11.9 Davisson and Germer Experiment 403
CHAPTER TWELVE
ATOMS
12.1 Introduction 414
12.2 Alpha-particle Scattering and Rutherford’s Nuclear Model of Atom 415
12.3 Atomic Spectra 420
12.4 Bohr Model of the Hydrogen Atom 422
12.5 The Line Spectra of the Hydrogen Atom 428
12.6 DE Broglie’s Explanation of Bohr’s Second Postulate of Quantisation 430
CHAPTER THIRTEEN
NUCLEI
13.1 Introduction 438
13.2 Atomic Masses and Composition of Nucleus 438
13.3 Size of the Nucleus 441
13.4 Mass-Energy and Nuclear Binding Energy 442
13.5 Nuclear Force 445
13.6 Radioactivity 446
13.7 Nuclear Energy 451
CHAPTER FOURTEEN
SEMICONDUCTOR ELECTRONICS: MATERIALS, DEVICES AND SIMPLE CIRCUITS
14.1 Introduction 467
14.2 Classification of Metals, Conductors and Semiconductors 468
14.3 Intrinsic Semiconductor 472
14.4 Extrinsic Semiconductor 474
14.5 p-n Junction 478
14.6 Semiconductor Diode 479
14.7 Application of Junction Diode as a Rectifier 483
14.8 Special Purpose p-n Junction Diodes 485
14.9 Digital Electronics and Logic Gates 490
ANSWERS 502
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