In this video by QuantumBoffin, an experiment demonstrates the total internal reflection of light inside a glass block. An angular scale is used to measure the critical angle and determine the refractive index of the glass [full video: ] , page 286

分享一个链接

发表一篇文章

任何有趣的，图片，热点新闻，视频，文字...

3238 位用户此时在线

24小时点击排行 Top 10：

3月19日，海南三亚一处强拆现场，上百名手持的盾牌的强拆人员在楼下整装待发，而户主们也在楼顶上准备好了石块。随着一声令下，强拆人员向大楼发起进攻，楼上的住户们也不看示弱，纷纷抄起石头朝着“攻城”的强拆人员们砸去，喊杀声此起彼伏。

毛阿敏迪拜酒店密会经纪人互相拥抱痛哭～～😂😂

整個國家一大半都是騙子，從習近平到市井混混，無一例外⋯⋯

医生朋友说，健身是为了死的更快，更果断！

近日，一位网友发出了一段交警在路口盘查电动车的视频，并配上恶狗凶狠怒吼的配音，视频发出后网友们纷纷在弹幕上表示：“这配音太到位了”“这配音形象完美”

#看完了这部乌克兰国防部视频：🇷🇺 俄军入侵士兵平视🇺🇦 乌军FPV无人机。

即结实又快速的扎袋口绳结

老师在高考前后的态度变化

近日，一名网名为“亮亮”的伊朗女性在社交平台发布视频，介绍冲突进入第16天后伊朗农村地区的生活状况。其在视频中表示，当地物资供应总体仍较为充足，但货币贬值明显，生活成本持续上升。

I met in Paris 🤯🎹 Today I was playing piano at Gate de Lyon when something incredible happened... Thank you for allowing us to play piano in the best condition on your amazing two upright pianos!

江苏连云港华杰中学的中考百日誓师大会，学校让学生们对着家长鞠躬、下跪磕头叩拜谢恩

“看屎？这爱好有点小众” 3月22日，山东，某领导视察公厕，现场随行人员众多，有人拍摄、有人陪同，还有人负责“外围警戒”。视频发布后评论区被清空，1215点赞却无一条评论。

老罗：这么多年了，她还是没打算放过我！

窦文涛：感恩不是道德问题，是逻辑和智商问题。

近日，多家媒体报道称，路由器巨头TP-Link创始人兼CEO赵建，通过“特朗普金卡”计划，申请美国永久居留权。消息一出，基本盘们纷纷在评论区表达愤怒：“别让他跑了” “查一查他是不是汉奸” “以后再也不用TP-Link，只用华为小米的路由器” “抵制TP-Link”

3月21日，辽宁。一访民在抖音开播10分钟直播间便遭到封禁，气到破口大骂：你们这些垃圾平台不让人说话，太欺负人了！你们把社会整的像监狱式的。我已经被封了20个账号，这个流氓国家我草泥马！

一个被删去的细节一位老作家，告诉笔者一件事情：由于一篇和她有关的文章在《人民日报》上发表，她去访问该报总编辑胡绩伟。他们在延安时代就认识。在胡的办公室里，她偶然听到了这位总编辑和刘少奇的妻子王光美在电话上的谈话。她说，胡绩伟和王光美在谈修改一篇将要发表的文章，是关于刘少奇的。

人大教授周孝正饭醉现场演讲座

3月22日，中石化宁波镇海炼化有限公司，一名疑似企业职工将狗带入食堂，并用食堂的筷子夹起自己餐盘里的骨头喂狗，还将筷子伸向狗嘴，甚至骨头掉在地上后仍用筷子夹起。

中国一卡稀土美国差点停摆，五角大楼砸4亿搞"曼哈顿计划"。美国产量翻十倍，美国稀土突围战

主持人问美国财长贝森特，川普发帖庆祝前特别检察官穆勒去世——写"太好了，我很高兴他死了"——是否合适，毕竟穆勒是铜星勋章、紫心勋章的越战老兵。

博尔顿：跟伊朗谈判没用，只能换政权

毛主席來過之後，支持他的人就算一百歲，還要自己撿柴生火取暖。

价值1800块的大马士革钢板做了把铲子，结果亮了！无法形容的帅、美！

近日，媒体报道称，福建霞浦县牙城镇派出所教导员李某，猥亵一名15岁的未成年女孩“强行抚摸胸部、生殖器入侵口腔等”获刑2年9个月。

本站自动实时分享网络热点
24小时实时更新
所有言论不代表本站态度
欢迎对信息踊跃评论评分
评分越高，信息越新，排列越靠前

2

1

0

In this video by QuantumBoffin, an experiment demonstrates the total internal reflection of light inside a glass block. An angular scale is used to measure the critical angle and determine the refractive index of the glass

[full video: ]
有趣
( buff.ly )

2年前由 Massimo 提交

1周内 1个月内 1年内全部时间

1

2

1

1

Close-up footage of the new humanoid robot Iron by the Chinese electric car company Xpeng that was presented yesterday. After the presentation, journalists were allowed to examine the robot and witness how it walked off the stage again. It was not a human in a robot suit.
有趣
( twitter.com)

4个月前 • non aesthetic things • 下载视频 0 评论

00:01:37

2

2

1

1

Hegseth's words on China at the Reagan Forum echoed those at the Shangri-La. But one Asian diplomat said, "It seems to have regressed."
In May, Hegseth had said that the threat of China conquering Taiwan by force is "real" and could be "imminent." If deterrence fails, he said,
时政
( twitter.com)

3个月前 • Ken Moriyasu 0 评论

3

3

2

2

Two Hong Kongers, one 23 and one 30 years old, have fallen in combat fighting for Ukraine; confirmed by CO of the 141st. Their bodies' locations have been marked for a retrieval mission when conditions allow. That's about all the Hong Kong diaspora is sharing about them publicly
时政
( twitter.com)

2个月前 • Nother Alex Fergusson Fella (again; v3) 🇬🇧❤️🇺🇦 0 评论

4

3

2

2

Chongqing Dianjiang No.1 High School | Violence, Coercion, and Silencing
On January 7, at Dianjiang No.1 High School in Chongqing, students were reportedly forced to get haircuts for a fee of RMB 10. One student who refused was pinned to the ground and kicked by three PE
时政
( twitter.com)

2个月前 • The Great Translation Movement 大翻译运动 • 下载视频 0 评论

00:01:28

5

2

1

1

True. MAGA is being ripped apart by the paid influencers, bots, and blind cultists who are operating in hive mind attacks against anyone who dares to criticize and demand accountability from the very President and Republican majority they voted for.
It is such a turn off and is
时政
( twitter.com)

2个月前 • Former Congresswoman Marjorie Taylor Greene🇺🇸 0 评论

6

2

1

1

If you claim to support human rights yet can’t bring yourself to show solidarity with those fighting for their liberty in Iran, you’ve revealed yourself. You don’t give a damn about people being oppressed and brutalised so long as it’s being done by the enemies of your enemies.
时政
( twitter.com)

2个月前 • J.K. Rowling 0 评论

7

2

1

1

Sadly it’s raining in Taipei right now so I don’t get to go climbing today. But I’ve been really touched by all the support and well wishes from folks - hopefully the weather improves and I get an opportunity to climb the beautiful Taipei 101. Fingers crossed! Same time tomorrow
时政
( twitter.com)

1个月前 • Alex Honnold • 下载视频 0 评论

00:00:45

8

2

1

1

Today, we reported our fourth quarter and full year 2025 financial results.
“We launched American Bitcoin in March 2025 with a clear mandate to accumulate Bitcoin at scale. Six months later, we were trading on the Nasdaq. By year-end, we held 5,401 Bitcoin on the balance sheet,
btc
( twitter.com)

24天前 • American Bitcoin 0 评论

9

2

1

1

Ian McKellen reads a poem called The First Letter to the Corinthians.
It was written by Artur Dron, Ukrainian Defender, writer, poet.
Please listen to it. These words are powerful and true.
"Love digs trenches and lives in them, gnawing on ice from a hacked up plastic bottle.
时政
( twitter.com)

26天前 • Anton Gerashchenko • 下载视频 0 评论

00:02:59

10

2

1

1

The Iranian women's football team were labeled "war-time traitors" by the regime's state TV after refusing to sing its anthem at the Asian women's cup in Australia
The Australian government was urged to allow them temporary refuge due to the grave threat of returning to Iran. It
时政
( twitter.com)

14天前 • Elica Le Bon الیکا‌ ل بن • 下载视频 0 评论

00:00:34

11

2

1

1

Managed to film at the Shahran oil depot in Western Tehran that was targeted by airstrikes last night. The oil still seems to be burning. We saw flames coming from some of the destroyed oil storage tanks. Also destroyed tanker trucks outside the gate. Sorry for audio issues, was
时政
( twitter.com)

14天前 • Frederik Pleitgen • 下载视频 0 评论

00:00:47

12

2

1

1

🥀March 8: Remember the Women of Iran
Sogand Pakdel was a 27-year-old transgender woman from Fars Province, Iran, and an active supporter of the “woman, life, freedom” movement.
Long rejected and abused by her family for her gender identity, she lived estranged in Shiraz under
时政
( twitter.com)

13天前 • پری‌سا 0 评论

13

2

1

1

Lioness being attacked by a hyena clan is quickly rescued by her pride
时政
( twitter.com)

2年前 • Crazy Clips • 下载视频 0 评论

00:00:30

14

2

1

1

A janitorial robot developed by Somatic cleans a toilet by itself

[read more: ]

有趣
( getsomatic.com)

2年前 • Massimo • 下载视频 0 评论

00:00:59

15

2

1

1

The son who was moved by his mother recognizing him only by touch.
有趣
( twitter.com)

4个月前 • The Figen • 下载视频 0 评论

00:00:45

16

2

1

1

Suzhou, the church by the lake.

Photo by weibo 苏州陈杰
图片
( twitter.com)

3年前 • Sharing travel 0 评论

17

2

1

1

六四36周年，做一个螳臂当车的歹徒。
Drawing for the 36th anniversary of Tiananmen Massacre.
In 1989 China’s national TV made this comment on tank man 'If our cavalry keeps moving forward, how can this mantis gangster （螳臂当车的歹徒）who is trying to stop us from moving forward
时政
( twitter.com)

9个月前 • 巴丢草 Bad ї ucao 0 评论

18

2

1

1

“I am a minor and they are arresting me”
Video
时政
( twitter.com)

1年前 • Katie Shoshiashvili • 下载视频 0 评论

00:00:24

19

2

1

1

The video that NASA does not want you to see!
有趣
( twitter.com)

1年前 • Curiosity • 下载视频 0 评论

00:00:00

20

2

1

1

me when i hear my own voice on a video
有趣
( twitter.com)

1年前 • NO CONTEXT HUMANS 0 评论

21

2

1

1

We have a contender for best video of the year
有趣
( twitter.com)

1年前 • humans without context • 下载视频 0 评论

00:00:13

22

2

1

1

Years later and I'm just now seeing the original video
有趣
( twitter.com)

1年前 • non aesthetic things • 下载视频 0 评论

00:00:39

23

2

1

1

me when i hear my own voice on a video
有趣
( twitter.com)

1年前 • humans without context 0 评论

24

2

1

1

VIDEO: President Biden thanking members of his cabinet and Congress
时政
( twitter.com)

1年前 • The Spectator Index • 下载视频 0 评论

00:00:08

25

2

1

1

Years later and I'm just now seeing the original video
有趣
( twitter.com)

1年前 • NO CONTEXT HUMANS • 下载视频 0 评论

00:00:42