3.Teaching Contents Section 1.Diffraction of Waves by Crystals (1)Bragg Law Key points:Understand why the crystal planes can be treated as mirrors with specular reflection.Beable to derive the Braggqionidering two neighbor crystal planes. Section 2.Scattered Wave Amplitude (1)Fourier Analysis Key points:Understand the Fourier components of physical properties in crystals. (2)Reciprocal Lattice Vectors Key points:Master the method to obtain reciprocal lattice vectors (3)Diffraction Conditions Key points:Understand the diffraction conditions of an incident wave in crystals. (4)④Laue Equations Key points:Be able to derive the Laue Equations and understand their equivalence to the Bragg Law. Section 3.Brillouin Zones Key points:Be familiar with the reciprocal lattices to the se.bec.and fec lattices.Grasp the method to find the Brillouin Zones of reciprocal lattice. 4.Teaching method PPT lectures.Handwritten derivation in class.discussion in class tutorial after class sef-directedeain 5.Evaluation Via homework assignments,thinking questions in class,quizzes. Chapter 3 Crystal Binding and Elastic Constants 1.Teaching Aim In this chapter students study the interatomic coupling for different elements.The energetic. mechanical,and geometric properties are discussed for typical binding types of atoms to construct crystal structures.Students are required to be familiar with the concept of binding constants for some simple cases3. Teaching Contents Section 1. Diffraction of Waves by Crystals (1) Bragg Law Key points: Understand why the crystal planes can be treated as mirrors with specular reflection. Be able to derive the Bragg equation considering two neighbor crystal planes. Section 2. Scattered Wave Amplitude (1) Fourier Analysis Key points: Understand the Fourier components of physical properties in crystals. (2) Reciprocal Lattice Vectors Key points: Master the method to obtain reciprocal lattice vectors. (3) Diffraction Conditions Key points: Understand the diffraction conditions of an incident wave in crystals. (4) Laue Equations Key points: Be able to derive the Laue Equations and understand their equivalence to the Bragg Law. Section 3. Brillouin Zones Key points: Be familiar with the reciprocal lattices to the sc, bcc, and fcc lattices. Grasp the method to find the Brillouin Zones of reciprocal lattice. 4. Teaching method PPT lectures, Handwritten derivation in class, discussion in class, tutorial after class, self-directed learning. 5. Evaluation Via homework assignments, thinking questions in class, quizzes. Chapter 3 Crystal Binding and Elastic Constants 1. Teaching Aim In this chapter students study the interatomic coupling for different elements. The energetic, mechanical, and geometric properties are discussed for typical binding types of atoms to construct crystal structures. Students are required to be familiar with the concept of binding energy and be able to estimate the binding energy, equilibrium lattice constant, and elastic constants for some simple cases