Chapter 14 Interference and Diffraction 14.1 Superposition of Waves....................... 14-2 14.1.1 Interference Conditions for Light Sources.... 14-4 14.2 Young's Double-Slit Experiment..... 14-4 Example 14.1:Double-Slit Experiment................ 14-8 14.3 Intensity Distribution 14-8 Example 14.2:Intensity of Three-Slit Interference... 14-11 14.4 Diffraction............. 14-13 14.5 Single-Slit Diffraction.................. 14-14 Example 14.3:Single-Slit Diffraction............ 14-16 14.6 Intensity of Single-Slit Diffraction..... 14-17 14.7 Intensity of Double-Slit Diffraction Patterns. 14-21 14.8 Diffraction Grating.. 14-22 14.9 Summary.… 14-23 14.10 Appendix:Computing the Total Electric Field... 14-24 14.11 Solved Problems ............... 14-28 14.11.1 Double-Slit Experiment.................... 14-28 14.11.2 Phase Difference................ 14-29 14.11.3 Constructive Interference................ 14-30 14.11.4 Intensity in Double-Slit Interference 14-31 14.11.5 Second-Order Bright Fringe........ 14-32 14.11.6 Intensity in Double-Slit Diffraction.. 14-32 14.12 Conceptual Questions................. 14-35 14.13 Additional Problems..... 14-35 14.13.1 Double-Slit Interference..... .14-35 14.13.2 Interference-Diffraction Pattern.. 14-36 14.13.3 Three-Slit Interference..... 14-36 14.13.4 Intensity of Double-Slit Interference........................... 14-36 14.13.5 Secondary Maxima............ 14-36 14.13.6 Interference-Diffraction Pattern. 14-37 14-114-1 Chapter 14 Interference and Diffraction 14.1 Superposition of Waves................................................................................... 14-2 14.1.1 Interference Conditions for Light Sources............................................... 14-4 14.2 Young’s Double-Slit Experiment .................................................................... 14-4 Example 14.1: Double-Slit Experiment................................................................. 14-8 14.3 Intensity Distribution ....................................................................................... 14-8 Example 14.2: Intensity of Three-Slit Interference ............................................. 14-11 14.4 Diffraction...................................................................................................... 14-13 14.5 Single-Slit Diffraction.................................................................................... 14-14 Example 14.3: Single-Slit Diffraction ................................................................. 14-16 14.6 Intensity of Single-Slit Diffraction ................................................................ 14-17 14.7 Intensity of Double-Slit Diffraction Patterns................................................. 14-21 14.8 Diffraction Grating......................................................................................... 14-22 14.9 Summary........................................................................................................ 14-23 14.10 Appendix: Computing the Total Electric Field.............................................. 14-24 14.11 Solved Problems ............................................................................................ 14-28 14.11.1 Double-Slit Experiment ....................................................................... 14-28 14.11.2 Phase Difference .................................................................................. 14-29 14.11.3 Constructive Interference..................................................................... 14-30 14.11.4 Intensity in Double-Slit Interference ................................................... 14-31 14.11.5 Second-Order Bright Fringe ................................................................ 14-32 14.11.6 Intensity in Double-Slit Diffraction..................................................... 14-32 14.12 Conceptual Questions .................................................................................... 14-35 14.13 Additional Problems ...................................................................................... 14-35 14.13.1 Double-Slit Interference....................................................................... 14-35 14.13.2 Interference-Diffraction Pattern........................................................... 14-36 14.13.3 Three-Slit Interference ......................................................................... 14-36 14.13.4 Intensity of Double-Slit Interference ................................................... 14-36 14.13.5 Secondary Maxima .............................................................................. 14-36 14.13.6 Interference-Diffraction Pattern........................................................... 14-37