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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=61" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">“全红”彩虹怎么形成的？太阳和水滴的魔法 </h1> <p class="xg1"> 时间：2015-12-21 16:05<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1260)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=3750&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=61" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>你见过只有一种颜色的“全红”彩虹吗？那么这种现象是如何形成的呢？研究人员12月17日在美国地球物理学联合会的秋季会议上提出，太阳在接近地平线时会导致彩虹只包含通常“赤橙黄绿青蓝紫”中的部分颜色。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><font face="宋体" size="3"> </font><p style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><font face="Tahoma"> </font></span></p><font face="宋体" size="3"> </font><p style="margin: 0cm 0cm 0pt;"><span lang="EN-US"><font face="Calibri"> </font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">我们平时看到的彩虹通常有3～7种颜色，那么，你见过只有一种颜色的“全红”彩虹吗？那么这种现象是如何形成的呢？</span></p><p style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><br></span></p><p style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"> 阳光在通过空气中的小水滴时发生折射，光谱中不同颜色的光折射率不同，令阳光分成不同的颜色，形成弧形彩色光带，我们称之为彩虹。有些彩虹并不包含通常彩虹所有的颜色，研究人员<font face="Calibri"><span lang="EN-US">12</span></font><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">月</span><font face="Calibri"><span lang="EN-US">17</span></font><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">日在美国地球<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>学联合会的秋季会议上提出，太阳在接近地平线时会导致彩虹只包含通常“赤橙黄绿青蓝紫”中的部分颜色。</span></span></p><p style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><br></span></span></p><p style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"></span><font face="宋体" size="3"> </font></p><font face="宋体" size="3"><p align="center" style="margin: 0cm 0cm 0pt;"><br></p><a class="opattach" href="javascript:;"><p align="center" style="margin: 0cm 0cm 0pt;"></p><font face="Tahoma"><p align="center" style="margin: 0cm 0cm 0pt;"><img class="cur1" onclick="insertImage('data/attachment/portal/201512/21/162028anllcnm8o8o5vbm5.jpg');" src="http://www.oecr.com/data/attachment/portal/201512/21/162028anllcnm8o8o5vbm5.jpg.thumb.jpg"><div align="left"></div></p></font></a></font><p style="margin: 0cm 0cm 0pt;"><font face="宋体" size="3"><a class="opattach" href="javascript:;"><font face="Tahoma"> </font></a></font></p><font face="宋体" size="3"> </font><p style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"> 在极为罕见的情况下，彩虹会只包含光谱中的部分颜色。此前的研究认为，这些颜色较少甚至单色的彩虹之所以形成，主要取决于令光线发生折射的水滴的大小。位于法国图卢兹的国家气象研究中心的大气科学家让·里卡尔及其同事将数以百计彩虹的照片编目分类。他们发现，太阳的位置扮演的角色比我们此前想的要重要得多。日落时分，太阳处于较低的位置，意味着光线必须在大气中旅行更长距离。在这一旅程中，冷色光在空气中发生散射。剩下那些暖色光令彩虹的红带加宽，最终将紫带、蓝带和橙带都挤走，导致彩虹只剩下红色。</span></p><p align="center" style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: 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name="comment_anchor_2710"></a> <dl id="comment_2710_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(2710, '3750');">引用</a> </span> <a href="http://club.oecr.com/space-uid-62961.html" class="xi2 xw1" c="1">sugar506</a> <span class="xg1 xw0">2015-12-22 04:52</span> </dt> <dd>这里不错啊，为啥都不评论呢</dd> </dl><a name="comment_anchor_2701"></a> <dl id="comment_2701_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(2701, '3750');">引用</a> </span> <a href="http://club.oecr.com/space-uid-10155.html" class="xi2 xw1" c="1">万山</a> <span class="xg1 xw0">2015-12-22 00:22</span> </dt> <dd>高科技啊</dd> </dl><a name="comment_anchor_2694"></a> <dl id="comment_2694_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(2694, '3750');">引用</a> </span> <a href="http://club.oecr.com/space-uid-71351.html" class="xi2 xw1" c="1">long710517</a> <span class="xg1 xw0">2015-12-21 20:52</span> </dt> <dd>速度有点慢</dd> </dl><a name="comment_anchor_2692"></a> <dl id="comment_2692_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(2692, '3750');">引用</a> </span> <a href="http://club.oecr.com/space-uid-38266.html" class="xi2 xw1" c="1">wangjun</a> <span class="xg1 xw0">2015-12-21 19:52</span> </dt> <dd>感谢分享哦。</dd> </dl><a name="comment_anchor_2690"></a> <dl id="comment_2690_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(2690, '3750');">引用</a> </span> <a href="http://club.oecr.com/space-uid-49014.html" class="xi2 xw1" c="1">reedy</a> <span class="xg1 xw0">2015-12-21 18:52</span> </dt> <dd>谢谢楼主的分享。</dd> </dl></div> </div> <!--[diy=diycontentcomment]--><div id="diycontentcomment" 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