《第十章光的干涉.ppt

光的单色性 劈尖夹角变化 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 劈尖例一 3.0mm 充油（ ）后测得 2.1mm 1.055 (rad) 1.43 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. k=2 1 0 1 光束 实验结果 （1）当平行光垂直照射双缝时，屏幕中央为明纹，向两侧分布明暗相间的条纹； （2）单色光条纹间距 ?x??。 （3）对于复色光， 明条纹有色散，内侧紫，外侧红； Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 条纹间距关系式 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 洛埃镜实验 紧靠镜端处总是产生暗纹，说明在镜端处反射光与入射光的相位差为 ，相当于光程差 ，称为 半波损失。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. n 1 n 2 折射波 反射波 半波损失 *当光从折射率大的光密介质，正入射于折射率小的光疏介质时，反射光没有半波损失。 *当光从折射率小的光疏介质，正入射或掠入射于折射率大的光密介质时，则反射光有半波损失。 有半波损失 *折射光没有相位突变 入射波 n 1 n 2 折射波 反射波 入射波 没有半波损失 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 双面镜实验 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 双棱镜实验 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 分波面法小结 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 光源有宽度w,则各部分在屏幕上形成的零级条纹如图: OB OA O A B C d S1 S2 w L D 如果边缘的明纹与中央部分的暗条纹相重叠后果如何? 理论计算可得光源的极限宽度 w0=L?/d 一般要求光源的宽度 w ≤ w0 /4 ? 即 w ≤ L? /(4d) 光源的宽度对干涉条纹的影响 五、干涉条纹的可见度与光源的宽度和单色性 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 第三节 10-3 amplitude-splitting interference Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 介质薄膜受到照明时而产生的干涉现象，称为 薄膜干涉。 (薄膜)等倾干涉 Evaluation on