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</gourl2><NodeID>1414</NodeID><Title>天空中的霓虹是怎样形成的?</Title><SoftSize>0.00</SoftSize><SoftSizeUnit>B</SoftSizeUnit><SoftSize>0.00</SoftSize><SoftSizeUnit>B</SoftSizeUnit><typeicon>other</typeicon><editor>czwlzx</editor><author>杨化谋</author><user>czwlzx</user><userface>/UploadFiles/UserPic/UserAvatars/15219_150_150.jpg</userface><Hits>
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   </Stars><Author>杨化谋</Author><infopoint>0</infopoint><Keyword>天空中,霓虹,是怎样形成的</Keyword><CopyFrom>《物理教师》</CopyFrom><SoftType></SoftType><CopyrightType></CopyrightType><DecompressPassword></DecompressPassword><OperatingSystem></OperatingSystem><UpdateTime>2006年09月03日</UpdateTime><RegUrl></RegUrl><DemoUrl /><DefaultPicUrl>/UploadFiles/wldekt_UploadFiles_3742/200609/20060903204837373.jpg</DefaultPicUrl><Intro>雨过天晴时，顺着太阳光看去，往往会看到一条弓形彩带，这条彩带，称为霓虹。如图1所示，区域称为虹，区域</Intro><SoftIntro2>雨过天晴时，顺着太阳光看去，往往会看到一条弓形彩带，这条彩带，称为霓虹。如图1所示，区域称为虹，区域称为霓，颜色顺序是由a到b为紫到红，由b到c为红到紫。为什么会形成这样的彩带呢?

我们首先分析虹的形成。
雨过天晴时，有大量小水珠悬浮在空中，太阳光在小水珠内经过二次折射和一次反射色散成如图2所示。从图上知道，每一水珠上出射光线中各种色光都有，但在某一位置P(如图3)的观看者从一个水珠M上只能看到一种颜色的光如紫光。在P点这个位置上看不到M这个水珠色散出来的其它颜色光如红光，要在P点看到红光，只能是比M高的某个位置N水珠色散出来的红光。这样P点既看到了紫光又看到了红光，即由a到b看到的颜色顺序为紫到红，这就是看</SoftIntro2><SoftIntro>
    【内容简介】雨过天晴时，顺着太阳光看去，往往会看到一条弓形彩带，这条彩带，称为霓虹。如图1所示，区域称为虹，区域称为霓，颜色顺序是由a到b为紫到红，由b到c为红到紫。为什么会形成这样的彩带呢?

我们首先分析虹的形成。
雨过天晴时，有大量小水珠悬浮在空中，太阳光在小水珠内经过二次折射和一次反射色散成如图2所示。从图上知道，每一水珠上出射光线中各种色光都有，但在某一位置P(如图3)的观看者从一个水珠M上只能看到一种颜色的光如紫光。在P点这个位置上看不到M这个水珠色散出来的其它颜色光如红光，要在P点看到红光，只能是比M高的某个位置N水珠色散出来的红光。这样P点既看到了紫光又看到了红光，即由a到b看到的颜色顺序为紫到红，这就是看到的虹。

    我们再来分析霓的形成。霓是太阳光在水珠内经二次折射和二次反射形成的色散光带，如图4所示，每一水珠上射出光线中各种色光都有。在某一位置P点(如图5)的观看者从一个水珠</SP</SoftIntro><SoftIntroEncode>雨过天晴时，顺着太阳光看去，往往会看到一条弓形彩带，这条彩带，称为霓虹。如图1所示，区域称为虹，区域称为霓，颜色顺序是由a到b为紫到红，由b到c为红到紫。</SoftIntroEncode><special /><DownloadUrl></DownloadUrl><Content>&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;雨过天晴时，顺着太阳光看去，往往会看到一条弓形彩带，这条彩带，称为霓虹。如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;1&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;所示，区域称为虹，区域称为霓，颜色顺序是由a&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;到b&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;为紫到红，由b&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;到c&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;为红到紫。为什么会形成这样的彩带呢&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;?&lt;?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm" align=center&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;IMG style="FILTER: ; WIDTH: 155px; HEIGHT: 165px" height=165 alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200609/20060903204837373.jpg" width=155 border=0 v:shapes="_x0000_i1029"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;我们首先分析虹的形成。&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;雨过天晴时，有大量小水珠悬浮在空中，太阳光在小水珠内经过二次折射和一次反射色散成如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;2&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;所示。从图上知道，每一水珠上出射光线中各种色光都有，但在某一位置P&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;(&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;3)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;的观看者从一个水珠&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;M&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;上只能看到一种颜色的光如紫光。在P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点这个位置上看不到M&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;这个水珠色散出来的其它颜色光如红光，要在P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点看到红光，只能是比M&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;高的某个位置N&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;水珠色散出来的红光。这样P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点既看到了紫光又看到了红光，即由a&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;到b&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;看到的颜色顺序为紫到红，这就是看到的虹。&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
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&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;SPAN style="mso-spacerun: yes"&gt;    &lt;/SPAN&gt;&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;我们再来分析霓的形成。霓是太阳光在水珠内经二次折射和二次反射形成的色散光带，如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;所示，每一水珠上射出光线中各种色光都有。在某一位置P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;(&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;5)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;的观看者从一个水珠&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;SPAN style="POSITION: relative; TOP: 2pt; mso-text-raise: -2.0pt"&gt;&lt;IMG style="FILTER: ; WIDTH: 25px; HEIGHT: 17px" height=17 alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200609/20060903204849999.gif" width=25 border=0 v:shapes="_x0000_i1041"&gt;&lt;/SP</Content><banben></banben><area></area><type></type><type2>不限</type2><ico></ico><video>&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;雨过天晴时，顺着太阳光看去，往往会看到一条弓形彩带，这条彩带，称为霓虹。如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;1&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;所示，区域称为虹，区域称为霓，颜色顺序是由a&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;到b&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;为紫到红，由b&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;到c&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;为红到紫。为什么会形成这样的彩带呢&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;?&lt;?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm" align=center&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;IMG style="FILTER: ; WIDTH: 155px; HEIGHT: 165px" height=165 alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200609/20060903204837373.jpg" width=155 border=0 v:shapes="_x0000_i1029"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;我们首先分析虹的形成。&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;雨过天晴时，有大量小水珠悬浮在空中，太阳光在小水珠内经过二次折射和一次反射色散成如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;2&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;所示。从图上知道，每一水珠上出射光线中各种色光都有，但在某一位置P&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;(&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;3)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;的观看者从一个水珠&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;M&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;上只能看到一种颜色的光如紫光。在P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点这个位置上看不到M&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;这个水珠色散出来的其它颜色光如红光，要在P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点看到红光，只能是比M&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;高的某个位置N&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;水珠色散出来的红光。这样P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点既看到了紫光又看到了红光，即由a&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;到b&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;看到的颜色顺序为紫到红，这就是看到的虹。&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; TEXT-INDENT: 21.75pt; LINE-HEIGHT: 150%; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm" align=center&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;IMG style="FILTER: ; WIDTH: 399px; HEIGHT: 205px" height=205 alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200609/20060903204843579.jpg" width=399 border=0 v:shapes="_x0000_i1039"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 7.8pt 0cm 15.6pt; LINE-HEIGHT: 150%; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm"&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;SPAN style="mso-spacerun: yes"&gt;    &lt;/SPAN&gt;&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;我们再来分析霓的形成。霓是太阳光在水珠内经二次折射和二次反射形成的色散光带，如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;所示，每一水珠上射出光线中各种色光都有。在某一位置P&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;(&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;5)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;的观看者从一个水珠&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%"&gt;&lt;SPAN style="POSITION: relative; TOP: 2pt; mso-text-raise: -2.0pt"&gt;&lt;IMG style="FILTER: ; WIDTH: 25px; HEIGHT: 17px" height=17 alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200609/20060903204849999.gif" width=25 border=0 v:shapes="_x0000_i1041"&gt;&lt;/SP</video><DefaultPicUrl>
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