Chapter 13 wave motion and sound 3. Matter waves物质波 these waves are associated with electrons protons(质子), and other fundamental particles. The most remarkable property of the matter waves is that wave functions of matter waves are referred to as probability amplitudes of waves. Much of what we discuss in this chapter applies to waves of all kinds. However, for specific examples we shall refer to mechanical waves
Chapter 13 Wave Motion and Sound 3. Matter Waves 物质波 The most remarkable property of the matter waves is that wave functions of matter waves are referred to as probability amplitudes of waves. Much of what we discuss in this chapter applies to waves of all kinds. However, for specific examples we shall refer to mechanical waves. these waves are associated with electrons, protons （ 质 子 ） , and other fundamental particles
Chapter 13 wave motion and sound Classification According to Oscillation Types(P327) 1. Transverse waves横波 The direction of oscillation of medium elements is perpendicular to the direction of travel of the wave。 Compressions and expansions correspond to the crests(波峰) and troughs(波谷) of a transverse waves。 ◆横波:质点振动方向与波的传播方向相垂直的波 (仅在固体中传播)
Chapter 13 Wave Motion and Sound Classification According to Oscillation Types(P327) 1. Transverse Waves 横波 The direction of oscillation of medium elements is perpendicular to the direction of travel of the wave. Compressions and expansions correspond to the crests (波峰) and troughs (波谷) of a transverse waves. ❖横波：质点振动方向与波的传播方向相垂直的波. （仅在固体中传播 ）
Chapter 13 wave motion and sound 09999999999999999x From the figure the wave has the shape of a sine curve or a cosine curve. a typical string element moves up and down continuously as the wave passes
Chapter 13 Wave Motion and Sound From the figure, the wave has the shape of a sine curve or a cosine curve. A typical string element moves up and down continuously as the wave passes
Chapter 13 wave motion and sound 特征1:具有交替出现的波峰 crest和波谷 trough 特征2:各质点振动方向与波的传播方向垂直 振动方向 传播方向 如绳波为横波
Chapter 13 Wave Motion and Sound ➢ 特征1：具有交替出现的波峰crest和波谷trough. ➢ 特征2：各质点振动方向与波的传播方向垂直。 如绳波为横波。 传播方向 振 动 方 向
Chapter 13 wave motion and sound 2. Longitudinal Waves纵波p328 The direction of oscilation of medium elements is parallel to the direction of the waves travel the motion is said to be longitudinal, and the wave is said to be a longitudinal wave ☆纵波:质点振动方向与波的传播方向互相平行的波 (可在固体、液体和气体中传播)
Chapter 13 Wave Motion and Sound 2. Longitudinal Waves 纵波 p328 The direction of oscillation of medium elements is parallel to the direction of the wave’s travel, the motion is said to be longitudinal, and the wave is said to be a longitudinal wave. ❖纵波：质点振动方向与波的传播方向互相平行的波. （可在固体、液体和气体中传播）