The applications of wave (The transmission of energy: solar energy, laser weapon (2)The transmission of information: radio, radar system, communications satellite, B-t2,X- ray
The applications of wave (1)The transmission of energy: solar energy, laser weapon, ... (2)The transmission of information: radio, radar system, communications satellite, B-超，x- ray,…
In a wave, information and energy move from one point to another but no material makes that journey. In this chapter, for specific examples we shall reer(涉及) to Mechanical Waves
In a wave, information and energy move from one point to another but no material makes that journey. In this chapter, for specific examples we shall refer(涉及) to Mechanical Waves
815-1 Formation Propagation of a mechanical wave机械波的产生和传播 1. Conditions of mechanical waves Two conditions: (1) There must be a vibrating center called source of wave 米信号源 波源; (2)There must be medium/ Molecules in medium propagating(传递)wve: are vibrating 媒质 ar 空气 依
§15-1 Formation & Propagation of a mechanical Wave 机械波的产生和传播 1. Conditions of mechanical waves: Two conditions: (1) There must be a vibrating center called source of wave: 波源； (2) There must be medium propagating(传递) wave: 媒质。 air空气 信号源 Molecules in medium are vibrating
2 Transverse(横) and Longitudinal(纵) Waves The particles of matter experience an oscillating displacement from equilibrium Particle wave It is convenient to classify( e)waves in terms of how the motion of the individual(单个) particles of medium is related to the movement of the waves itself: · Transverse waves横波: wave along the string; Longitudinal waves纵波: sound wave
2.Transverse(横) and Longitudinal(纵) Waves The particles of matter experience an oscillating displacement from equilibrium. It is convenient to classify(分类) waves in terms of how the motion of the individual(单个) particles of medium is related to the movement of the waves itself: •Transverse waves 横波： wave along the string; •Longitudinal waves纵波: sound wave. Particle wave
Transverse waves横波: The individual particles move up and down at right angles(直角) to the direction in which the wave propagates: string 振动 波动
Transverse waves 横波: The individual particles move up and down at right angles(直角） to the direction in which the wave propagates： string 振动 波动