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1、三 探究凸透镜 成像规律 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.现象：同一个凸透镜能成不同的像。问题：猜想：设计实验设 计课 题预 备实 验1 05论 证口 诀练 习拓 展挑 战
2、返 回结 束应 用凸透镜成的像的虚实、大小 、正倒跟什么关系？ Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 问题：同一个凸透镜能成不同的像。 猜想：照相机、投影仪和放大镜成像不 同，
3、可能与 有关。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.自主学习 认真阅读课本97.98页，自主完成 下列问题： 设计实验1.要完成该实验，需要哪些器材 ？ 2 在该实验中，我们需
4、要记录那些数据和 实验现象? 3 尝试写出实验步骤与方法。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.预备知识：u物体 凸透镜中心1.物距(u)： 到 的距离；v凸透镜中心像 2.像距
5、(v)： 到 的距离；设 计课 题预 备实 验1 05论 证口 诀练 习拓 展挑 战返 回结 束应 用40 2568u=?u=?V =?=?15cm28cmEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose
6、Pty Ltd.课题：探究凸透镜成像的规律 实验目的：探究凸透镜成像规律蜡烛、凸透镜、光屏、光具座等 实验器材:设 计课 题预 备实 验1 05论 证口 诀练 习拓 展挑 战返 回结 束应 用FF2F2F40Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.C
7、opyright 2004-2011 Aspose Pty Ltd.实验时注意点：1、多次实验,观察物体的成像.2、光屏上接收到的像叫实像.一定要是清晰明亮 的烛焰像.3、及时根据像的性质记录物距和像距.4、注意把凸透镜、烛焰和光屏的中心调成同一高 度。5、固定透镜，把蜡烛从远离透镜，向透镜靠近， 移动光屏接收像。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client
8、 Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.注意：1、调节烛焰、凸透镜、光屏使它们的中心在 同一高度，为了使烛焰的像成在光屏的中央。2、虚像：不是实际光线会聚而成，光屏上得不 到的像。实像：由实际光线会聚而成的,能显示在光 屏上。实验探究、收集数据设 计课 题预 备实 验1 05论 证口 诀练 习拓 展挑 战返 回结 束应 用Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3
9、.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.次数物距（U） cm像(V)cm像的情况放大/缩 小正立/倒立实像/虚 像同侧/异 侧123等大倒立4567Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profil
10、e 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.分析一：1.当物体成 缩小.倒立的实像时 ，物 距（U）和凸透镜的焦距f=10cm的关系是 。它的应用是 。 2.当物体成 放大.倒立的实像时 ，物距（U） 和凸透镜的焦距f=10cm的关系是 。它的应 用是 。 3. 当物体成放大.正立的虚像时 ，物距（U） 和凸透镜的焦距f=10cm的关系是 。它的应 用是
11、 。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.1像的虚实：凸透镜在什么条件下成实像，在什么条 件下成虚像 2 像的大小：凸透镜在什么条件下缩小的像，什么条 件下成放大的像。 结论：
12、物距有两个位置是影响成像性质的关键点：u =f是成 像的分界点；u =2f 是 成 像的分界点；凸透镜所成的实像都是立的，虚像都是 立的。 分析二Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty L
13、td.分析三：仔细分析我们还会发现：当物体逐渐向 凸透镜靠近时，光屏的位置是逐渐 （选填“靠 近”、“远离”），在光屏上所成的像是逐渐 （选填“变大”、“变小”）的。（物近、像远，像 变大）Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright
14、2004-2011 Aspose Pty Ltd.知识拓展Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.凸透镜成像规律记忆口诀分界点：一倍焦距一倍焦距 分虚实，二倍焦距二倍焦距 分大小；
15、实像的变化：物近近像远远像变大大。设 计课 题预 备实 验1 05论 证口 诀练 习拓 展挑 战返 回结 束应 用Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.规律小结 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyri
