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				第1课时　探究凸透镜成像的规律
				
				
凸透镜成像规律：u&gt;2f，成倒立缩小实像；f&lt;2f，成倒立</Intro><SoftIntro2>
				第1课时　探究凸透镜成像的规律
				
				
凸透镜成像规律：u&gt;2f，成倒立缩小实像；f&lt;2f，成倒立放大的实像；u&gt;
实验中，应使烛焰(不是蜡烛)、凸透镜和光屏的中心大致在同一高度(如果是用刻度尺代替光具座，必须得强调在同一直线)上，这样做是为了让烛焰的像成在光屏中央．
小刚探究“凸透镜成像规律”的实验装置如图所示，其中焦距为15 cm的凸透镜固定在光具座上50 cm刻度线处，光屏和点燃的蜡烛分别位于凸透镜的两侧．
(1)小刚将蜡烛移至光具座上10 cm刻度线处，移动光屏，直到烛焰在光屏上成清晰的像，则该像是________的实像．
(2)小刚将蜡烛移至光具座上30 cm刻度线处，移动光屏，直到烛焰在光屏上成清晰的像，则该像是_______</SoftIntro2><SoftIntro>
    【内容简介】
				第1课时　探究凸透镜成像的规律
				
				
凸透镜成像规律：u>2f，成倒立缩小实像；f<2f，成倒立放大的实像；u>
实验中，应使烛焰(不是蜡烛)、凸透镜和光屏的中心大致在同一高度(如果是用刻度尺代替光具座，必须得强调在同一直线)上，这样做是为了让烛焰的像成在光屏中央．
小刚探究“凸透镜成像规律”的实验装置如图所示，其中焦距为15 cm的凸透镜固定在光具座上50 cm刻度线处，光屏和点燃的蜡烛分别位于凸透镜的两侧．
(1)小刚将蜡烛移至光具座上10 cm刻度线处，移动光屏，直到烛焰在光屏上成清晰的像，则该像是________的实像．
(2)小刚将蜡烛移至光具座上30 cm刻度线处，移动光屏，直到烛焰在光屏上成清晰的像，则该像是________的实像．
(3)小刚将蜡烛移至光具座上40 cm刻度线处，小刚从透镜的右侧通过透镜可以看到烛焰________的像．
【提示】　蜡烛在光具座上10 cm处，物距u＝40 cm>2f，故物体通过凸透镜成的是倒立、缩小的实像．蜡烛在光具座上30 cm处，物距u＝20 cm,2f>20 cm>f，故物体通过凸透镜成的是倒立、放大的实像．蜡烛在光具座上40 cm处，物距u＝10 cm
【答案】　(1)倒立、缩小　(2)倒立、放大　(3)正立、放大
知识点1　探究凸透镜成像规律的实验
1．实验目的：探究像的虚实、大小、正倒跟______的关系．
2．实验器材：______、凸透镜、______和________等．
3．物体到凸透镜的距离叫______，用字母u表示，像到凸透镜的距离叫______，用字母v表示．
........
		
				
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				第1课时　探究凸透镜成像的规律
				
				
凸透镜成像规律：u&gt;2f，成倒立缩小实像；f&lt;2f，成倒立放大的实像；u&gt;
实验中，应使烛焰(不是蜡烛)、凸透镜</SoftIntroEncode><special /><DownloadUrl>下载地址1|stzx_UploadFiles_64/201509/2015092405572095.doc</DownloadUrl><Content>&lt;p&gt;
				&lt;strong&gt;第1课时　探究凸透镜成像的规律&lt;/strong&gt;
				&lt;br /&gt;
				&lt;br /&gt;
凸透镜成像规律：u&amp;gt;2f，成倒立缩小实像；f&lt;u&gt;&amp;lt;2f，成倒立放大的实像；u&amp;gt;&lt;f，成正立放大的虚像．&gt;&lt;br /&gt;&lt;br /&gt;
实验中，应使烛焰(不是蜡烛)、凸透镜和光屏的中心大致在同一高度(如果是用刻度尺代替光具座，必须得强调在同一直线)上，这样做是为了让烛焰的像成在光屏中央．&lt;br /&gt;&lt;br /&gt;
小刚探究“凸透镜成像规律”的实验装置如图所示，其中焦距为15 cm的凸透镜固定在光具座上50 cm刻度线处，光屏和点燃的蜡烛分别位于凸透镜的两侧．&lt;br /&gt;&lt;br /&gt;
(1)小刚将蜡烛移至光具座上10 cm刻度线处，移动光屏，直到烛焰在光屏上成清晰的像，则该像是________的实像．&lt;br /&gt;
(2)小刚将蜡烛移至光具座上30 cm刻度线处，移动光屏，直到烛焰在光屏上成清晰的像，则该像是________的实像．&lt;br /&gt;
(3)小刚将蜡烛移至光具座上40 cm刻度线处，小刚从透镜的右侧通过透镜可以看到烛焰________的像．&lt;br /&gt;
【提示】　蜡烛在光具座上10 cm处，物距u＝40 cm&amp;gt;2f，故物体通过凸透镜成的是倒立、缩小的实像．蜡烛在光具座上30 cm处，物距u＝20 cm,2f&amp;gt;20 cm&amp;gt;f，故物体通过凸透镜成的是倒立、放大的实像．蜡烛在光具座上40 cm处，物距u＝10 cm&lt;f，故物体通过凸透镜成的是正立、放大的虚像．&gt;&lt;br /&gt;
【答案】　(1)倒立、缩小　(2)倒立、放大　(3)正立、放大&lt;br /&gt;&lt;br /&gt;
知识点1　探究凸透镜成像规律的实验&lt;br /&gt;
1．实验目的：探究像的虚实、大小、正倒跟______的关系．&lt;br /&gt;
2．实验器材：______、凸透镜、______和________等．&lt;br /&gt;
3．物体到凸透镜的距离叫______，用字母u表示，像到凸透镜的距离叫______，用字母v表示．&lt;br /&gt;
........&lt;/f，故物体通过凸透镜成的是正立、放大的虚像．&gt;&lt;/f，成正立放大的虚像．&gt;&lt;/u&gt;&lt;/p&gt;
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