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 131

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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

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NATO Isn’t Courting China — It’s Setting China Up. Why NATO Allies Are Suddenly Flying to Beijing.
NATO allies from Canada's Carney to UK's Starmer are suddenly lining up to visit Beijing — and China thinks this means the West is shifting its stance.
It isn’t.
This video breaks
时政
( twitter.com)

1个月前 • Ken Cao-The China Crash Chronicle • 下载视频 0 评论

00:10:55

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'MUSK' SEE MOMENT: Heartwarming video of President Trump with Elon Musk's young son "Lil X" goes viral, with one internet user saying, "I love this picture! Lil X looks so happy!
btc
( twitter.com)

1年前 • Fox News • 下载视频 0 评论

00:00:29

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African beats innocent white man unconscious. White onlookers do nothing as the man gets savaged! Separation not integration!
Please share this video to raise awareness about what’s happening to white people!
时政
( twitter.com)

11个月前 • Niall McConnell 🇮🇪 • 下载视频 0 评论

00:01:03

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🎶... JUST IMAGINE...
This video is created using 100% Grok Imagine clips.
28 archival images + 14 custom Grok images = 75+ beautifully animated Grok Imagine clips!
🦻-Turn on Captions for Lyrics!
btc
( twitter.com)

5个月前 • Rich Silver • 下载视频 0 评论

00:03:33

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Today, Elon Musk joined a video call with researchers, archaeologists, and students studying Ancient Rome
This comes after he donated $1 million to support their ongoing research on the ancient civilization
btc
( twitter.com)

4个月前 • SMX 🇺🇸 • 下载视频 0 评论

00:01:02

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We’re launching Mission China’s new video series, #ConversationsOnDemocracy. I will be speaking with American leaders about what democracy means to them. Watch this trailer to learn who my first guests are.
时政
( twitter.com)

2年前 • Ambassador Nicholas Burns • 下载视频 0 评论

00:01:21

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The dog escaped and his owner was worried, looking for him everywhere...
30 mins later she received this video of him having the time of his life with some strangers. 😂
有趣
( twitter.com)

3个月前 • The Figen • 下载视频 0 评论

00:00:19

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'China Bound', my history of John Swire & Sons, just published in translation in Taiwan by 麥田出版, translated by 葉品岑.
太古集團與近代中國: 十九世紀駛入中國的英國商人，如何參與商業零和遊戲？
时政
( twitter.com)

2年前 • Robert Bickers 0 评论

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Raccoon seems to nod in thanks to man who helped him escape dumpster

The video, filmed in New York, shows the man placing a plank of wood in just the right place to allow the cute animals to climb out of their predicament.

He later wrote online: "As I pulled into my driveway…
有趣
( twitter.com)

2年前 • Epoch Animal Lovers • 下载视频 0 评论

00:00:45

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Christian preachers in UK persecuted and threatened by British police. Meanwhile, Muslim immigrants can do whatever they want without being disturbed by the aforementioned police. The UK will soon become an Islamic caliphate with Sharia law attached.
时政
( twitter.com)

1年前 • RadioGenoa • 下载视频 0 评论

00:00:12

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#BREAKING Artist Sanmu showed up in Causeway Bay alone on the eve of the 35th anniversary of #June4TiananmenCrackdown. He was soon surrounded first by reporters and then police. He was just taken away by a police van.
时政
( twitter.com)

1年前 • Xinqi Su 蘇昕琪 • 下载视频 0 评论

00:01:00

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Video of Mancester Airport attack. It is clearly seen that Muslim criminals attack British police and break nose of female police officer. Why aren't these ruthless criminals in jail?
时政
( twitter.com)

1年前 • RadioGenoa • 下载视频 0 评论

00:00:27

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In Elon‘s latest MAGA mash video，among all the USA flags，lions and Trump hair, he also showcased a big Chinese rocket （中国航天）
Such Patriotism 🇨🇳
时政
( twitter.com)

1年前 • 巴丢草 Bad ї ucao 0 评论

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Introducing Imagine v0.9, our new video generation model with massive upgrades from v0.1 in visual quality, motion, audio generation, and more.
Now available for free on all our products:
btc
( grok.com)

5个月前 • xAI • 下载视频 0 评论

00:00:25

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"I'm an Iranian who lives in Tehran...In case I'm dead tomorrow, I just want you to remember this.
"Please. Shut the fuсk up and don't use me against America or Israel...We asked for this. We want this attack...
"I know I might die...I'm willing to sacrifice my life for Iran."
时政
( twitter.com)

15天前 • dahlia kurtz ✡︎ דליה קורץ • 下载视频 0 评论

00:01:04

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🇺🇸DOGE FACES UNJUST OBSTRUCTION
Doge has hit an unnecessary roadblock. U.S. District Judge Paul Engelmayer's ex parte order, preventing DOGE from accessing critical Treasury Department data, showcases a clear overreach by the judiciary.
This decision, influenced by a lawsuit
btc
( twitter.com)

1年前 • Mario Nawfal 0 评论

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This image by Pablo Carlos Budassi shows the observable universe on an increasingly compact scale, with the Earth and Sun at the center surrounded by our Solar System, nearby stars, galaxies, filaments of early matter, and the cosmic microwave background
有趣
( buff.ly)

2年前 • Massimo 0 评论

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The current natural #OriginOfCovid argument, by 4 of 5 Proximal Origin authors, rests on the unscientific assertion that the early case data provided by Chinese authorities are representative of the earliest cases.

This assumes:
1⃣A non-biased, rigorous search
2⃣Transparency
时政
( twitter.com)

2年前 • Alina Chan 0 评论

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I can't believe I just noticed this. Turns out when measured by GDP per capita (PPP), Taiwan's lead over China has been GROWING, despite a slower growth rate measured by percentage changes. Had to use a graphing calculator to understand why.
时政
( twitter.com)

1年前 • Huey Li 0 评论

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vivian wilson (aka eon msk’s estranged daughter) for teen vogue photographed by andy jackson, everything about this shoot is absolutely GENIUS!!!!
时政
( twitter.com)

1年前 • corinne ☆ 0 评论

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🚨GOLD PRICES TOP $3,500 FOR THE FIRST TIME EVER
At this pace, gold will hit $4K by the end of the year.
时政
( twitter.com)

11个月前 • Jesse Cohen 0 评论

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Still think that you can escape Islamism by leaving Britain and heading to Australia?
Think again… this is what Australia looks like now…..
时政
( twitter.com)

10个月前 • Paul Golding • 下载视频 0 评论

00:00:42

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UNITED STATES: Chances of Elon Musk starting his own political party by the end of this year surge to 44%, according to Polymarket.
时政
( twitter.com)

8个月前 • The Spectator Index 0 评论

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This was the first Starship to be static fired on the orbital launch mount, which was modified by engineers and technicians at Starbase
btc
( twitter.com)

7个月前 • SpaceX • 下载视频 0 评论

00:00:39

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Low birth rate is the number one threat to the West, followed closely by migration.
There will be no West if this continues.
btc
( twitter.com)

6个月前 • Elon Musk 0 评论