透过焦距为5cm的凸透镜成像实验观察15cm远的草莓,我们能看到哪样的草莓?

草莓草莓酱的喜欢 | LOFTER(乐乎) - 记录生活,发现同好
LOFTER for ipad —— 记录生活,发现同好
草莓草莓酱 的喜欢
&nbsp&nbsp被喜欢
&nbsp&nbsp被喜欢
{list posts as post}
{if post.type==1 || post.type == 5}
{if !!post.title}${post.title|escape}{/if}
{if !!post.digest}${post.digest}{/if}
{if post.type==2}
{if post.type == 3}
{if !!post.image}
{if post.type == 4}
{if !!post.image}
{if !!photo.labels && photo.labels.length>0}
{var wrapwidth = photo.ow < 500?photo.ow:500}
{list photo.labels as labs}
{var lbtxtwidth = Math.floor(wrapwidth*(labs.ort==1?labs.x:(100-labs.x))/100)-62}
{if lbtxtwidth>12}
{if !!labs.icon}
{list photos as photo}
{if photo_index==0}{break}{/if}
品牌${make||'-'}
型号${model||'-'}
焦距${focalLength||'-'}
光圈${apertureValue||'-'}
快门速度${exposureTime||'-'}
ISO${isoSpeedRatings||'-'}
曝光补偿${exposureBiasValue||'-'}
镜头${lens||'-'}
{if data.msgRank == 1}{/if}
{if data.askSetting == 1}{/if}
{if defined('posts')&&posts.length>0}
{list posts as post}
{if post_index < 3}
{if post.type == 1 || post.type == 5}
{if !!post.title}${post.title|escape}{/if}
{if !!post.digest}${post.digest}{/if}
{if post.type == 2}
{if post.type == 3}
{if post.type == 4}
{if drlist.length>0}
更多相似达人:
{list drlist as dr}{if drlist.length === 3 && dr_index === 0}、{/if}{if drlist.length === 3 && dr_index === 1}、{/if}{if drlist.length === 2 && dr_index === 0}、{/if}{/list}
暂无相似达人,
{if defined('posts')&&posts.length>0}
{list posts as post}
{if post.type == 2}
{if post.type == 3}
{if post.type == 4}
this.p={ dwrMethod:'queryLikePosts',fpost:'1d0399ac_a45609a',userId:,blogListLength:26};草莓cups的推荐 | LOFTER(乐乎) - 记录生活,发现同好
LOFTER for ipad —— 记录生活,发现同好
草莓cups 的推荐
&nbsp&nbsp被喜欢
&nbsp&nbsp被喜欢
{list posts as post}
{if post.type==1 || post.type == 5}
{if !!post.title}${post.title|escape}{/if}
{if !!post.digest}${post.digest}{/if}
{if post.type==2}
{if post.type == 3}
{if !!post.image}
{if post.type == 4}
{if !!post.image}
{if !!photo.labels && photo.labels.length>0}
{var wrapwidth = photo.ow < 500?photo.ow:500}
{list photo.labels as labs}
{var lbtxtwidth = Math.floor(wrapwidth*(labs.ort==1?labs.x:(100-labs.x))/100)-62}
{if lbtxtwidth>12}
{if !!labs.icon}
{list photos as photo}
{if photo_index==0}{break}{/if}
品牌${make||'-'}
型号${model||'-'}
焦距${focalLength||'-'}
光圈${apertureValue||'-'}
快门速度${exposureTime||'-'}
ISO${isoSpeedRatings||'-'}
曝光补偿${exposureBiasValue||'-'}
镜头${lens||'-'}
{if data.msgRank == 1}{/if}
{if data.askSetting == 1}{/if}
{if defined('posts')&&posts.length>0}
{list posts as post}
{if post_index < 3}
{if post.type == 1 || post.type == 5}
{if !!post.title}${post.title|escape}{/if}
{if !!post.digest}${post.digest}{/if}
{if post.type == 2}
{if post.type == 3}
{if post.type == 4}
{if drlist.length>0}
更多相似达人:
{list drlist as dr}{if drlist.length === 3 && dr_index === 0}、{/if}{if drlist.length === 3 && dr_index === 1}、{/if}{if drlist.length === 2 && dr_index === 0}、{/if}{/list}
暂无相似达人,
{if defined('posts')&&posts.length>0}
{list posts as post}
{if post.type == 2}
{if post.type == 3}
{if post.type == 4}
this.p={ dwrMethod:'querySharePosts', fpost:'7ea4e_4e8bff9',userId:3227531,blogListLength:30};请使用支持脚本的浏览器!
此博客不存在或已被删除
网易公司版权所有 & ICP备:浙B2-槐兮的喜欢 | LOFTER(乐乎) - 记录生活,发现同好
LOFTER for ipad —— 记录生活,发现同好
槐兮 的喜欢
&nbsp&nbsp被喜欢
&nbsp&nbsp被喜欢
{list posts as post}
{if post.type==1 || post.type == 5}
{if !!post.title}${post.title|escape}{/if}
{if !!post.digest}${post.digest}{/if}
{if post.type==2}
{if post.type == 3}
{if !!post.image}
{if post.type == 4}
{if !!post.image}
{if !!photo.labels && photo.labels.length>0}
{var wrapwidth = photo.ow < 500?photo.ow:500}
{list photo.labels as labs}
{var lbtxtwidth = Math.floor(wrapwidth*(labs.ort==1?labs.x:(100-labs.x))/100)-62}
{if lbtxtwidth>12}
{if !!labs.icon}
{list photos as photo}
{if photo_index==0}{break}{/if}
品牌${make||'-'}
型号${model||'-'}
焦距${focalLength||'-'}
光圈${apertureValue||'-'}
快门速度${exposureTime||'-'}
ISO${isoSpeedRatings||'-'}
曝光补偿${exposureBiasValue||'-'}
镜头${lens||'-'}
{if data.msgRank == 1}{/if}
{if data.askSetting == 1}{/if}
{if defined('posts')&&posts.length>0}
{list posts as post}
{if post_index < 3}
{if post.type == 1 || post.type == 5}
{if !!post.title}${post.title|escape}{/if}
{if !!post.digest}${post.digest}{/if}
{if post.type == 2}
{if post.type == 3}
{if post.type == 4}
{if drlist.length>0}
更多相似达人:
{list drlist as dr}{if drlist.length === 3 && dr_index === 0}、{/if}{if drlist.length === 3 && dr_index === 1}、{/if}{if drlist.length === 2 && dr_index === 0}、{/if}{/list}
暂无相似达人,
{if defined('posts')&&posts.length>0}
{list posts as post}
{if post.type == 2}
{if post.type == 3}
{if post.type == 4}
this.p={ dwrMethod:'queryLikePosts',fpost:'',userId:,blogListLength:30};某同学在做凸透镜成像的实验时,所用凸透镜的焦距为10cm,老师要求他观察物距等于5cm、15cm时烛焰所成的像.实验时,他将点燃的蜡烛移到物距为5cm处(如图),移动光屏,发现光屏上只有光斑(图中未画出).(1)下列关于光斑的说法正确的是:______(选填“A”或“B”或“C”).A.光斑是烛焰所成的实像B.光斑是烛焰所成的虚像C.光斑是烛焰发出的光折射到光屏上形成的(2)为了观察物距等于5cm时烛焰的成像特点,请你写出接下来的操作步骤:______.(3)为了观察物距等于15cm时烛焰的成像特点,请你写出接下来的操作步骤:______.
(1)蜡烛在凸透镜的5cm处时,u<f,在透镜的一倍焦距以内,在蜡烛同侧成的是正立放大的虚像,在光屏上不能成像,光屏上的光斑是烛焰发出的光折射到光屏上形成的;(2)蜡烛在凸透镜的5cm处时,u<f,在透镜的一倍焦距以内,在蜡烛同侧成的是正立放大的虚像,要想观察烛焰的成像特点,需移动光屏,从凸透镜的右侧通过凸透镜观察.(3)蜡烛在凸透镜的5cm处时,f<u<2f,在透镜的另一侧成倒立放大的实像,此时应移动光屏,直到出现清晰的像为止,通过光屏观察成像特点.故答案为:(1)C;(2)移动光屏,从凸透镜的右侧通过凸透镜观察;(3)移动光屏,直到出现清晰的像为止,并通过光屏观察.
为您推荐:
蜡烛在凸透镜的一倍焦距以内时,成的是正立放大的虚像,在光屏上不能成像,光屏上的光斑是烛焰发出的光折射到光屏上形成的;要想观察烛焰的虚像成像特点,眼睛在光屏处透过透镜观察像的特点;若物距处于f和2f之间,凸透镜成倒立放大的实像,此时可通过光屏观察成像的特点.
本题考点:
凸透镜成像规律及其探究实验.
考点点评:
此题主要考查的是学生对凸透镜成像规律的了解和掌握,要熟练掌握凸透镜成像的特点与物距的关系,并注意像和物体的位置关系.
扫描下载二维码

我要回帖

更多关于 凸透镜 的文章

 

随机推荐