File:Fluorescence in calcite.jpg
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说明
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This image was selected as picture of the day on Wikimedia Commons for 16 January 2018. It was captioned as follows: Other languages:
Italiano: Fluorescenza e birifrangenza prodotta da un fascio laser blu da 445 nm in un cristallo di calcite. Polski: Zjawisko fluorescencji oraz dwójłomności w krysztale kalcytu oświetlonym niebieskim laserem o długości fali 445 nm. Русский: Флуоресценция и двойное лучепреломление синего лазера с длиной волны 445 нанометров в кристале кальцита. Українська: Флюоресценція та подвійне променезаломлення синього лазеру з довжиною хвилі 445 нанометрів в кристалі кальциту. |
摘要
[编辑]描述Fluorescence in calcite.jpg |
English: Fluorescence and birefringence of 445 nm laser in calcite crystal.
The blue laser beam is only visible when the blue light is scattered, for example, by dust particles. Due to the 1.3s exposure time, no individual dust particles can be seen. Dust particles are present in the air, but not in the crystal. In the crystal, some part of the blue light is absorbed and re-emitted as orange light, which is called fluorescence. Most of the blue light just continues to the other end of the crystal. On the lower left you can see the laser beam going in. Part of the light is reflected on the front surface of the crystal; this is the beam you see on the upper left. In the crystal, the two polarisations are refracted by different angles, forming two beams in the crystal. At the end surface, the two beams (both of which are polarised along the axes of the crystal) are refracted back to their original direction, forming the two parallel beams on the right. Inside the crystal, the two beams cause fluorescence and non-polarised orange light is emitted from each point along both beams in every direction. As this light leaves the crystal, it's separated into two orthogonal polarisations, which are refracted by different angles, so that the observer sees four orange beams. The additional spots and beams you can see result from internal reflections.Français : Fluorescence et birefringence dans un bloc de calcite par un laser de 445nm.
Polski: Zjawisko fluorescencji oraz dwójłomności w krysztale kalcytu oświetlonym niebieskim laserem o długości fali 445 nm.
Русский: Флюоресценция и двойное лучепреломление лазерного луча с длиной волны 445 нм в кристалле кальцита
Українська: Флюоресценція та подвійне променезаломлення синього лазеру з довжиною хвилі 445 нанометрів в кристалі кальциту.
Italiano: Fluorescenza e birifrangenza prodotta da un fascio laser blu da 445 nm in un cristallo di calcite.
فارسی: نگارهای از ضریب شکست مضاعف پرتوهای لیزر در حالی که از طریق یک کانی کلسیت عبور میکند ، برخی از اثرات فلورسنس نیز وجود دارد. |
日期 | |
来源 | 自己的作品 |
作者 | Jan Pavelka |
This image was uploaded as part of European Science Photo Competition 2015. |
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日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
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当前 | 2015年11月30日 (一) 15:07 | 3,456 × 2,304(1.97 MB) | Hapecko(留言 | 贡献) | User created page with UploadWizard |
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- Commons:Competição Wiki Ciência 2017 no Brasil
- Commons:European Science Photo Competition 2015/Winners
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- Commons:Photo challenge/2018 - November - Measurements
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- Commons:Wiki Science Competition 2023 in Argentina/Categories
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- Template:Potd/2018-01
- Template:Potd/2018-01-16
- Template:Potd/2018-01-16 (cs)
- Template:Potd/2018-01-16 (en)
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- Template:POTD/2022-04-29
- Wikipedia:Main Page history/2022 April 29
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- Wikipedia:Reference desk/Archives/Science/2022 April 30
- User:Acharya Agnivrat/Vaidic Physics
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- Huygens principle of double refraction
- en.wikibooks.org上的用途
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元数据
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相机制造商 | Canon |
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相机型号 | Canon EOS 350D DIGITAL |
曝光时间 | 13/10秒(1.3) |
光圈值 | f/2 |
感光度(ISO) | 100 |
数据生成日期时间 | 2011年5月26日 (四) 11:22 |
镜头焦距 | 50毫米 |
方向 | 正常 |
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
文件修改日期时间 | 2011年5月26日 (四) 14:18 |
亮度(Y)和色度(C)位置 | 重叠 |
曝光程序 | 快门优先 |
Exif版本 | 2.21 |
数字化日期时间 | 2011年5月26日 (四) 11:22 |
每个色彩组分意义 |
|
APEX快门速度 | −0.37850952148438 |
APEX光圈 | 2 |
APEX曝光补偿 | 0 |
测光模式 | 多区 |
闪光灯 | 闪光灯未点亮、闪光灯强制关闭 |
支持的Flashpix版本 | 1 |
色彩空间 | sRGB |
焦平面X分辨率 | 3,954.233409611 |
焦平面Y分辨率 | 3,958.7628865979 |
焦平面分辨率单位 | 英寸 |
自订图像处理 | 普通处理 |
曝光模式 | 自动曝光 |
白平衡 | 自动白平衡 |
场景拍摄类型 | 标准 |
隐藏分类:
- Pictures of the Year (finalist)
- Pictures of the Year/2016 (finalist)
- Pictures of the Year (candidate)
- Pictures of the Year (2016)
- Pictures of the day (2018)
- Featured pictures on Wikimedia Commons
- Featured pictures on Wikipedia, English
- Featured pictures on Wikipedia, Persian
- Images from European Science Photo Competition 2015 in the Czech Republic
- CC-BY-SA-4.0
- Self-published work
- Uploaded via Campaign:espc-cz
- General category images from European Science Photo Competition 2015
- Featured pictures from Wiki Science Competition
- Featured pictures of minerals