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GCSE物理知識點總結——波的性質

知識點       時間:2019-12-06 15:38      

 

  Properties of waves,including light and sound波的性質包括光和聲是GCSE物理學習中的第三部分內容,下面A+國際教育小編就帶大家了解一下這部分內容所涉及的GCSE物理知識點以及公式,來幫助同學們加深這部分內容的學習印象。


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  3.1 General wave properties普通波的性質


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


  通過用波動的意義解釋繩子,彈簧和水波的振動試驗


  2-use the term wavefront用波振面


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


  給出速率,頻率,波長和幅度的意義。


  4-recall and use the equation v=fλ


  記住和應用等式速率=平率×時間


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


  區(qū)分橫波和縱波并且舉出合適的例子。


  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折射由于速率的改變。


  (iii)diffraction produced by wide and narrow gaps


  通過寬的或窄的縫隙產生衍射。


  7-interpret reflection,refraction and diffraction using wave theory


  用波的理論解釋反射,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,給出特點在平面鏡中呈現的光學圖像。


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


  3-perform simple constructions,measurements and calculations


  演示簡單的結構測量和計算。


  (b)Refraction of light光的衍射


  1-describe an experimental demonstration of the refraction of light


  描述一個實驗解釋光的衍射現象。


  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


  會用術語入射角i折射角r并且描述光通過兩個透明的平行板。


  3-give the meaning of critical angle


  給出一些重要角度的意義。


  4-describe internal and total internal reflection


  描述內部的和總的反射


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


  記住和應用以速度定義折射率n.


  6-recall and use the equation sin i/sin r=n記住和應用等式sin i/sin r=n


  7-describe the action of optical fibres描述纖維光學的作用。


  (c)Thin converging lens薄的匯聚透鏡


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


  描述薄聚焦透鏡對一束光的作用。


  2-use the term principal focus and focal length


  會用主焦點和焦距。


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


  用光線圖來解釋通過單鏡頭形成的實相。


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


  畫光線圖來解釋通過單鏡頭形成的虛像。


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


  用和描述利用一個單鏡頭作為一個放大鏡。


  (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


  定性的分析當光通過棱鏡分散的行為


  (e)Electromagnetic spectrum電磁波譜


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


  描述電磁波的主要特點和描述所有的波以同樣的速度在真空中傳播。


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


  描述電磁波速度值。


  3-use the term monochromatic


  用單一的一色的。


  3.3 Sound聲音


  1-describe the production of sound by vibrating sources


  描述聲音是由振動產生。


  2-describe the longitudinal nature of sound waves


  描述聲音的縱向特性。


  3-state the approximate range of audible frequencies


  描述可聽得見波的大概頻率。


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


  展示和理解聲音的傳播需要介質。


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


  描述一個測量聲音在空氣中傳播的速度。


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


  聲波的響度和音調與振幅和頻率之間的關系。


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


  描述聲音的反射產生回聲。


  8-describe compression and rarefaction


  描述壓縮和稀疏


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


  描述液體和固體在空氣中傳播速率大小的順序。


  以上就是A+小編關于Properties of waves,including light and sound部分的GCSE物理知識點的整理和總結,同學們可以作為這部分學習中的一份參考。如果在學習中還有什么疑問,歡迎隨時咨詢A+國際教育課程輔導老師,讓老師一對一為你進行專業(yè)的課程輔導工作吧!

 

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