GCSE物理知识点总结——波的性质

知识点       时间:2019-12-06 15:38      

 

  Properties of waves,including light and sound波的性质包括光和声是GCSE物理学习中的第三部分内容,下面A+国际教育小编就带大家了解一下这部分内容所涉及的GCSE物理知识点以及公式,来帮助同学们加深这部分内容的学习印象。


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  3.1 General wave properties普通波的性质


  1-describe what is meant by wave motion as illustrated by vibration in ropes,springs and by experiments using water waves


  通过用波动的意义解释绳子,弹簧和水波的振动试验


  2-use the term wavefront用波振面


  3-give the meaning of speed,frequency,wavelength and amplitude


  给出速率,频率,波长和幅度的意义。


  4-recall and use the equation v=fλ


  记住和应用等式速率=平率×时间


  5-distinguish between transverse and longitudinal waves and give suitable examples


  区分横波和纵波并且举出合适的例子。


  6-describe the use of water waves to show用水波描述


  (i)reflection at a plane surface平面反射


  (ii)refraction due to a change of speed折射由于速率的改变。


  (iii)diffraction produced by wide and narrow gaps


  通过宽的或窄的缝隙产生衍射。


  7-interpret reflection,refraction and diffraction using wave theory


  用波的理论解释反射,折射和衍射。


  3.2 Light光


  (a)Reflection of light光的反射


  1-describe the formation,and give the characteristics,of an optical image by a plane mirror


  描述形成,给出特点在平面镜中呈现的光学图像。


  2-use the law angle of incidence=angle of reflection会用入射角等于反射角


  3-perform simple constructions,measurements and calculations


  演示简单的结构测量和计算。


  (b)Refraction of light光的衍射


  1-describe an experimental demonstration of the refraction of light


  描述一个实验解释光的衍射现象。


  2-use the terminology for the angle of incidence i and angle of refraction r and describe the passage of light through parallel-sided transparent material


  会用术语入射角i折射角r并且描述光通过两个透明的平行板。


  3-give the meaning of critical angle


  给出一些重要角度的意义。


  4-describe internal and total internal reflection


  描述内部的和总的反射


  5-recall and use the definition of refractive n in terms of speed


  记住和应用以速度定义折射率n.


  6-recall and use the equation sin i/sin r=n记住和应用等式sin i/sin r=n


  7-describe the action of optical fibres描述纤维光学的作用。


  (c)Thin converging lens薄的汇聚透镜


  1-describe the action of a thin converging lens on a beam of light


  描述薄聚焦透镜对一束光的作用。


  2-use the term principal focus and focal length


  会用主焦点和焦距。


  3-draw ray diagrams to illustrate the formation of a real image by a single lens


  用光线图来解释通过单镜头形成的实相。


  4-draw ray diagrams to illustrate the formation of a virtual image by a single lens


  画光线图来解释通过单镜头形成的虚像。


  5-use and describe the use of a single lens as a magnifying glass


  用和描述利用一个单镜头作为一个放大镜。


  (d)Dispersion of light光的分散


  1-give a qualitative account of the dispersion of light as illustrated by the action on light of a glass prism


  定性的分析当光通过棱镜分散的行为


  (e)Electromagnetic spectrum电磁波谱


  1-describe the main features of the electromagnetic spectrum and state that all e.m.waves travel with the same high speed in vacuo


  描述电磁波的主要特点和描述所有的波以同样的速度在真空中传播。


  2-state the approximate value of the speed of electro-magnetic waves


  描述电磁波速度值。


  3-use the term monochromatic


  用单一的一色的。


  3.3 Sound声音


  1-describe the production of sound by vibrating sources


  描述声音是由振动产生。


  2-describe the longitudinal nature of sound waves


  描述声音的纵向特性。


  3-state the approximate range of audible frequencies


  描述可听得见波的大概频率。


  4-show an understanding that a medium is required in order to transmit sound waves


  展示和理解声音的传播需要介质。


  5-describe an experiment to determine the speed of sound in air


  描述一个测量声音在空气中传播的速度。


  6-relate the loudness and pitch of sound waves to amplitude and frequency


  声波的响度和音调与振幅和频率之间的关系。


  7-describe how the reflection of sound may produce an echo


  描述声音的反射产生回声。


  8-describe compression and rarefaction


  描述压缩和稀疏


  9-state the order of magnitude of the speed of sound in air,liquids and solids


  描述液体和固体在空气中传播速率大小的顺序。


  以上就是A+小编关于Properties of waves,including light and sound部分的GCSE物理知识点的整理和总结,同学们可以作为这部分学习中的一份参考。如果在学习中还有什么疑问,欢迎随时咨询A+国际教育课程辅导老师,让老师一对一为你进行专业的课程辅导工作吧!

 

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