3.1 Formation of Waves
Definition: A wave is a disturbance that transfers
energy from one point to another without the permanent displacement of the
medium itself. Mechanical waves require a material medium (such as air, water,
or solids) to propagate, and they are generated when a source causes a
disturbance in the medium. Types of Mechanical Waves: - **Transverse Waves:** In transverse
waves, particles of the medium move perpendicular to the direction of wave
propagation. Examples include waves on a string and electromagnetic waves. Wave Propagation: Waves propagate through a medium by the
continuous transfer of energy from one particle to the next. The initial
disturbance created by a source (such as a vibrating object) causes adjacent
particles to oscillate, which in turn transfers energy to neighboring
particles, thus allowing the wave to travel through the medium. Example Problem:
A stone is dropped into a calm pond,
creating ripples that spread out in all directions. What type of wave is this? Solution:
The ripples on the water surface are an
example of transverse waves, where the water particles move up and down
(perpendicular to the direction of wave propagation). |
Copyright © 2000-2015 陈雷英语 All Rights Reserved.
|
|
本网站所刊登的英语教学各种新闻﹑信息和各种专题专栏资料,均为陈雷英语版权所有,未经协议授权,禁止下载使用。
|
|