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</gourl2><NodeID>1409</NodeID><Title>声音“吹灭”蜡烛</Title><SoftSize>0.00</SoftSize><SoftSizeUnit>B</SoftSizeUnit><SoftSize>0.00</SoftSize><SoftSizeUnit>B</SoftSizeUnit><typeicon>other</typeicon><editor>czwlzx</editor><author>czwlzx</author><user>czwlzx</user><userface>/UploadFiles/UserPic/UserAvatars/15219_150_150.jpg</userface><Hits>
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   </Stars><Author>czwlzx</Author><infopoint>0</infopoint><Keyword>浅议,小实验,物理学科,调节教学中的作用</Keyword><CopyFrom>原创</CopyFrom><SoftType></SoftType><CopyrightType></CopyrightType><DecompressPassword></DecompressPassword><OperatingSystem></OperatingSystem><UpdateTime>2007年07月07日</UpdateTime><RegUrl></RegUrl><DemoUrl /><DefaultPicUrl>/UploadFiles/wldekt_UploadFiles_3742/200707/20070707104424385.gif</DefaultPicUrl><Intro>声音具有能量，它表达了物体的振动，当声音传递到人耳引起耳鼓膜振动时，我们可以感觉到声音。它是一种看不</Intro><SoftIntro2>声音具有能量，它表达了物体的振动，当声音传递到人耳引起耳鼓膜振动时，我们可以感觉到声音。它是一种看不到、摸不着的声波。下面介绍用声音“吹灭”蜡烛实验。
实验器材：田径比赛时用的发令枪，蜡烛，大一些的抛物面反射镜一对(或小铁锅一对)，直径30cm、焦距8cm的抛物面反射镜，光具座，烛台，十字夹，试管夹，铁架台等。
实验方法：实验装置如图1所示。

                  
(1)将直径及焦距相同的两个抛物面反射镜分别固定在铁架台上相向放置，间距约60～70cm，间距的大小是依照抛物面反射镜或锅的大小灵活而定。
(2)在两个抛物面反射镜下方放置一个光具座。
(3)测定抛物面反射镜的焦距。方法一：应用公式&lt;IMG  height=44 src="{PE.</SoftIntro2><SoftIntro>
    【内容简介】声音具有能量，它表达了物体的振动，当声音传递到人耳引起耳鼓膜振动时，我们可以感觉到声音。它是一种看不到、摸不着的声波。下面介绍用声音“吹灭”蜡烛实验。
实验器材：田径比赛时用的发令枪，蜡烛，大一些的抛物面反射镜一对(或小铁锅一对)，直径30cm、焦距8cm的抛物面反射镜，光具座，烛台，十字夹，试管夹，铁架台等。
实验方法：实验装置如图1所示。

                  
(1)将直径及焦距相同的两个抛物面反射镜分别固定在铁架台上相向放置，间距约60～70cm，间距的大小是依照抛物面反射镜或锅的大小灵活而定。
(2)在两个抛物面反射镜下方放置一个光具座。
(3)测定抛物面反射镜的焦距。方法一：应用公式<IMG  height=44 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200707/20070707104425829.gi</SoftIntro><SoftIntroEncode>声音具有能量，它表达了物体的振动，当声音传递到人耳引起耳鼓膜振动时，我们可以感觉到声音。它是一种看不到、摸不着的声波。下面介绍用声音“吹灭”蜡烛实验。</SoftIntroEncode><special /><DownloadUrl></DownloadUrl><Content>&lt;P class=MsoNormal style="MARGIN: 6pt 21pt 12pt 0cm; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 21.0pt; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;声音具有能量，它表达了物体的振动，当声音传递到人耳引起耳鼓膜振动时，我们可以感觉到声音。它是一种看不到、摸不着的声波。下面介绍用声音“吹灭”蜡烛实验。&lt;SPAN lang=EN-US&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;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22.1pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;B style="mso-bidi-font-weight: normal"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;实验器材&lt;/SPAN&gt;&lt;/B&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;：田径比赛时用的发令枪，蜡烛，大一些的抛物面反射镜一对&lt;SPAN lang=EN-US&gt;(&lt;/SPAN&gt;或小铁锅一对&lt;SPAN lang=EN-US&gt;)&lt;/SPAN&gt;，直径&lt;?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /&gt;&lt;st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="30" UnitName="cm"&gt;&lt;SPAN lang=EN-US&gt;30cm&lt;/SPAN&gt;&lt;/st1:chmetcnv&gt;、焦距&lt;st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="8" UnitName="cm"&gt;&lt;SPAN lang=EN-US&gt;8cm&lt;/SPAN&gt;&lt;/st1:chmetcnv&gt;的抛物面反射镜，光具座，烛台，十字夹，试管夹，铁架台等。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22.1pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;B style="mso-bidi-font-weight: normal"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;实验方法：&lt;/SPAN&gt;&lt;/B&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;实验装置如图&lt;SPAN lang=EN-US&gt;1&lt;/SPAN&gt;所示。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; 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; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=center&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-no-proof: yes"&gt;&lt;?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /&gt;&lt;v:shapetype id=_x0000_t75 stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"&gt;&lt;v:stroke joinstyle="miter"&gt;&lt;/v:stroke&gt;&lt;v:formulas&gt;&lt;v:f eqn="if lineDrawn pixelLineWidth 0"&gt;&lt;/v:f&gt;&lt;v:f eqn="sum @0 1 0"&gt;&lt;/v:f&gt;&lt;v:f eqn="sum 0 0 @1"&gt;&lt;/v:f&gt;&lt;v:f eqn="prod @2 1 2"&gt;&lt;/v:f&gt;&lt;v:f eqn="prod @3 21600 pixelWidth"&gt;&lt;/v:f&gt;&lt;v:f eqn="prod @3 21600 pixelHeight"&gt;&lt;/v:f&gt;&lt;v:f eqn="sum @0 0 1"&gt;&lt;/v:f&gt;&lt;v:f eqn="prod @6 1 2"&gt;&lt;/v:f&gt;&lt;v:f eqn="prod @7 21600 pixelWidth"&gt;&lt;/v:f&gt;&lt;v:f eqn="sum @8 21600 0"&gt;&lt;/v:f&gt;&lt;v:f eqn="prod @7 21600 pixelHeight"&gt;&lt;/v:f&gt;&lt;v:f eqn="sum @10 21600 0"&gt;&lt;/v:f&gt;&lt;/v:formulas&gt;&lt;v:path o:connecttype="rect" gradientshapeok="t" o:extrusionok="f"&gt;&lt;/v:path&gt;&lt;o:lock aspectratio="t" v:ext="edit"&gt;&lt;/o:lock&gt;&lt;/v:shapetype&gt;&lt;/SPAN&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=center&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;                  &lt;IMG  height=151 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200707/20070707104424385.gif" width=245 onload=javascript:resizepic(this) border=0&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;(1)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;将直径及焦距相同的两个抛物面反射镜分别固定在铁架台上相向放置，间距约&lt;SPAN lang=EN-US&gt;60&lt;/SPAN&gt;～&lt;st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="70" UnitName="cm"&gt;&lt;SPAN lang=EN-US&gt;70cm&lt;/SPAN&gt;&lt;/st1:chmetcnv&gt;，间距的大小是依照抛物面反射镜或锅的大小灵活而定。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;(2)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;在两个抛物面反射镜下方放置一个光具座。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;(3)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;测定抛物面反射镜的焦距。方法一：应用公式&lt;SPAN lang=EN-US style="POSITION: relative; TOP: 14pt; mso-no-proof: yes; mso-text-raise: -14.0pt"&gt;&lt;IMG  height=44 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200707/20070707104425829.gi</Content><banben></banben><area></area><type></type><type2>不限</type2><ico></ico><video>&lt;P class=MsoNormal style="MARGIN: 6pt 21pt 12pt 0cm; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 21.0pt; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;声音具有能量，它表达了物体的振动，当声音传递到人耳引起耳鼓膜振动时，我们可以感觉到声音。它是一种看不到、摸不着的声波。下面介绍用声音“吹灭”蜡烛实验。&lt;SPAN lang=EN-US&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;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22.1pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;B style="mso-bidi-font-weight: normal"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;实验器材&lt;/SPAN&gt;&lt;/B&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;：田径比赛时用的发令枪，蜡烛，大一些的抛物面反射镜一对&lt;SPAN lang=EN-US&gt;(&lt;/SPAN&gt;或小铁锅一对&lt;SPAN lang=EN-US&gt;)&lt;/SPAN&gt;，直径&lt;?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /&gt;&lt;st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="30" UnitName="cm"&gt;&lt;SPAN lang=EN-US&gt;30cm&lt;/SPAN&gt;&lt;/st1:chmetcnv&gt;、焦距&lt;st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="8" UnitName="cm"&gt;&lt;SPAN lang=EN-US&gt;8cm&lt;/SPAN&gt;&lt;/st1:chmetcnv&gt;的抛物面反射镜，光具座，烛台，十字夹，试管夹，铁架台等。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22.1pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;B style="mso-bidi-font-weight: normal"&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;实验方法：&lt;/SPAN&gt;&lt;/B&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;实验装置如图&lt;SPAN lang=EN-US&gt;1&lt;/SPAN&gt;所示。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
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&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=center&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;                  &lt;IMG  height=151 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200707/20070707104424385.gif" width=245 onload=javascript:resizepic(this) border=0&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;(1)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;将直径及焦距相同的两个抛物面反射镜分别固定在铁架台上相向放置，间距约&lt;SPAN lang=EN-US&gt;60&lt;/SPAN&gt;～&lt;st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="70" UnitName="cm"&gt;&lt;SPAN lang=EN-US&gt;70cm&lt;/SPAN&gt;&lt;/st1:chmetcnv&gt;，间距的大小是依照抛物面反射镜或锅的大小灵活而定。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;(2)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;在两个抛物面反射镜下方放置一个光具座。&lt;SPAN lang=EN-US&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="MARGIN: 6pt 0cm 12pt; WORD-BREAK: break-all; TEXT-INDENT: 22pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: 1.0gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0; mso-pagination: widow-orphan; mso-layout-grid-align: none" align=left&gt;&lt;SPAN lang=EN-US style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;(3)&lt;/SPAN&gt;&lt;SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'"&gt;测定抛物面反射镜的焦距。方法一：应用公式&lt;SPAN lang=EN-US style="POSITION: relative; TOP: 14pt; mso-no-proof: yes; mso-text-raise: -14.0pt"&gt;&lt;IMG  height=44 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/wldekt_UploadFiles_3742/200707/20070707104425829.gi</video><DefaultPicUrl>
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        <div class="clear">
        </div>
    </div>
</div>

<!--弹出登录结束--> 
<!-- 这个是背景黑色半透明遮罩，不能包含弹窗，否则会出现弹窗透明现象 -->
<div id="bjtidu_ground" onclick="closeModel()"> </div>
<!-- 这个是用来展示弹框内容的 -->
<div id="login_model"><iframe name='LogOnFrame' id='LogOnFrame' src='' width='300' height='400' fullscreen=true download=false print=false openfile=false frameborder='no' border='0'></iframe></div>
<script>
    /* 打开弹出框的功能 */
   function openModel() {
        document.getElementById("bjtidu_ground").style.display = 'block';
        document.getElementById("login_model").style.display = 'block';
       // 禁止浏览器滚动
        document.body.style.overflow = 'hidden';
    }
    /**
    * 关闭弹出框的功能*/
    function closeModel() {
        document.getElementById("bjtidu_ground").style.display = 'none';
        document.getElementById("login_model").style.display = 'none';
        // 不遮挡后面的内容将body设置为原始样式，也就是实现可滚动
        document.body.style.overflow = 'auto';
    }

  $("#wxlog").click(function(){
    $("#LogOnFrame").attr("src","/qrconn.aspx");
  })

$(function(){
    var ua = navigator.userAgent.toLowerCase(); 
    if(ua.match(/iPad/i)=="ipad" || ua.match(/Mobile/i)=="mobile") { 
     $("#wxlog").hide();
    }
    else{
    }
})
</script>
<script type="text/javascript" src="/Template/Default/Skin/MMskin/js/tools.js"></script>
<script>
(function(){
    var bp = document.createElement('script');
    var curProtocol = window.location.protocol.split(':')[0];
    if (curProtocol === 'https') {
        bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
    }
    else {
        bp.src = 'http://push.zhanzhang.baidu.com/push.js';
    }
    var s = document.getElementsByTagName("script")[0];
    s.parentNode.insertBefore(bp, s);
})();
</script>


{PE.Label id="A评论标签" nodeId="{PE.Field id="cone" fieldname="NodeID" /}" /}
</body>
</html>