正在加载视频...

视频加载失败

加载此视频时出现问题。这可能是由于临时网络问题，或视频可能不可用。

This rock glows Most sodalite will fluoresce orange under UV light Electromagnetic radiation (light from the UV flashlight) is absorbed which then re-emits radiation at a longer wavelength – in this case, the yellow glow

Science girl

5,811,241 subscribers

1,688,159 次观看 • 3 年前 •via X (Twitter)

Anya Rossi• Live Now

Private livecam show

0 条评论

暂无评论

原始帖子的评论将显示在这里

相关视频

When a nuclear reactor is switched on for the first time, an intense, almost hypnotic blue glow appears in the water surrounding the reactor core. This light is neither fire nor heat; it is Cherenkov radiation, a physical phenomenon that occurs when charged particles, such as high-energy electrons produced during nuclear fission, travel through a transparent medium faster than light can propagate within that same medium. While nothing can exceed the speed of light in a vacuum, light travels more slowly in materials like water. When a charged particle surpasses this reduced speed, it emits a coherent shock-like electromagnetic wave, often described as an optical analogue of a sonic boom. This radiation produces the distinctive blue glow. The colour arises because Cherenkov radiation is strongest at shorter wavelengths, which are dominated by blue and ultraviolet light. The phenomenon was first observed experimentally in 1934 and later explained theoretically, work that led to the Nobel Prize in Physics in 1958. Its explanation confirmed how relativity and electromagnetism operate in material media. Today, this deep blue light is both a warning and a scientific tool. It signals the presence of intense ionising radiation, while also being exploited in particle detectors, nuclear reactors, and neutrino observatories. It provides a rare, visible manifestation of subatomic processes that are otherwise hidden from direct human perception. #GottaLovePhysics #Physics

When a nuclear reactor is switched on for the first time, an intense, almost hypnotic blue glow appears in the water surrounding the reactor core. This light is neither fire nor heat; it is Cherenkov radiation, a physical phenomenon that occurs when charged particles, such as high-energy electrons produced during nuclear fission, travel through a transparent medium faster than light can propagate within that same medium. While nothing can exceed the speed of light in a vacuum, light travels more slowly in materials like water. When a charged particle surpasses this reduced speed, it emits a coherent shock-like electromagnetic wave, often described as an optical analogue of a sonic boom. This radiation produces the distinctive blue glow. The colour arises because Cherenkov radiation is strongest at shorter wavelengths, which are dominated by blue and ultraviolet light. The phenomenon was first observed experimentally in 1934 and later explained theoretically, work that led to the Nobel Prize in Physics in 1958. Its explanation confirmed how relativity and electromagnetism operate in material media. Today, this deep blue light is both a warning and a scientific tool. It signals the presence of intense ionising radiation, while also being exploited in particle detectors, nuclear reactors, and neutrino observatories. It provides a rare, visible manifestation of subatomic processes that are otherwise hidden from direct human perception. #GottaLovePhysics #Physics

Erika 

276,219 次观看 • 8 个月前

The 1.9 X-flare from earlier today is still in-progress, categorizing this as a long-duration event. The Americas were just hit with A TON of light radiation!

The 1.9 X-flare from earlier today is still in-progress, categorizing this as a long-duration event. The Americas were just hit with A TON of light radiation!

Stefan Burns

105,736 次观看 • 8 个月前

Black people are built differently. Sunlight acts as the primary trigger for melanin production in Black people. When UV rays penetrate your skin, melanocytes produce this pigment to shield your DNA from radiation damage.

Black people are built differently. Sunlight acts as the primary trigger for melanin production in Black people. When UV rays penetrate your skin, melanocytes produce this pigment to shield your DNA from radiation damage.

Typical African

12,406 次观看 • 2 个月前

The Ghost of Cassiopeia: a cosmic phantom in the glow of a volatile star 👻 Located 550 light-years from Earth, the IC 63 nebula is a ghostly cloud of dust and gas. It is gradually being eroded by the intense radiation from a nearby, unpredictable star: Gamma Cassiopeiae. Autumn and winter are the best times to observe this remarkable object from the Northern Hemisphere. 🔭

The Ghost of Cassiopeia: a cosmic phantom in the glow of a volatile star 👻 Located 550 light-years from Earth, the IC 63 nebula is a ghostly cloud of dust and gas. It is gradually being eroded by the intense radiation from a nearby, unpredictable star: Gamma Cassiopeiae. Autumn and winter are the best times to observe this remarkable object from the Northern Hemisphere. 🔭

Black Hole

24,114 次观看 • 1 个月前

$I finally got to witness a rare “green flash” for the first time! Sunlight at sunset travels thru a lot of our atmosphere, which refracts (bends) the light like a prism. The shorter wavelength violet/blue colors scatter before reaching us, while the longer red/orange colors…➡️$

I finally got to witness a rare “green flash” for the first time! Sunlight at sunset travels thru a lot of our atmosphere, which refracts (bends) the light like a prism. The shorter wavelength violet/blue colors scatter before reaching us, while the longer red/orange colors…➡️

Paul Gross

125,297 次观看 • 21 天前

🔥 Crazy advertising: this is how sunscreen is promoted in Tel Aviv Israel is one of the countries with the highest levels of solar radiation in the world. In Tel Aviv, the UV index stays extremely high almost all year round. Even locals avoid going outside without protection — the sun there is absolutely brutal.

🔥 Crazy advertising: this is how sunscreen is promoted in Tel Aviv Israel is one of the countries with the highest levels of solar radiation in the world. In Tel Aviv, the UV index stays extremely high almost all year round. Even locals avoid going outside without protection — the sun there is absolutely brutal.

NEXTA

45,027 次观看 • 4 个月前

What female goes into the sallyport at midnight? Needs a flashlight from her friend to light up the vehicle and then touches the vehicle with no gloves on???? This video was brightened 200% from the original

Sensitive content

What female goes into the sallyport at midnight? Needs a flashlight from her friend to light up the vehicle and then touches the vehicle with no gloves on???? This video was brightened 200% from the original

Dixie Normus

144,647 次观看 • 3 个月前

A Cosmic "Bubble": The Birth and Death of Stars Through Hubble's Lens 🫧 Located 7,100 light-years away, the NGC 7635 nebula owes its shape to the powerful stellar wind from a massive central star. This giant sphere of gas and dust is illuminated by intense radiation, creating one of the most spectacular sights in our galaxy.

A Cosmic "Bubble": The Birth and Death of Stars Through Hubble's Lens 🫧 Located 7,100 light-years away, the NGC 7635 nebula owes its shape to the powerful stellar wind from a massive central star. This giant sphere of gas and dust is illuminated by intense radiation, creating one of the most spectacular sights in our galaxy.

Black Hole

27,909 次观看 • 1 个月前

$Your cat looking at you five years later after the entire global nuclear arsenal of 12,000 warheads detonated all within the same year. The enormous fires injected enough soot into the stratosphere to drastically reduce the sunlight reaching Earth, so everything now receives only a fraction of the light it once did. Because of increased exposure to ionizing radiation and UV radiation causing DNA damage and genetic mutations, you are slowly beginning to realize that your beloved companion is starting to look dramatically different from the one you once knew. With what little time you have left, you can only watch as your surviving furry friend continues to change into something you no longer recognize as them.$

Your cat looking at you five years later after the entire global nuclear arsenal of 12,000 warheads detonated all within the same year. The enormous fires injected enough soot into the stratosphere to drastically reduce the sunlight reaching Earth, so everything now receives only a fraction of the light it once did. Because of increased exposure to ionizing radiation and UV radiation causing DNA damage and genetic mutations, you are slowly beginning to realize that your beloved companion is starting to look dramatically different from the one you once knew. With what little time you have left, you can only watch as your surviving furry friend continues to change into something you no longer recognize as them.

Radioactive Red

28,519 次观看 • 2 天前

Farming looks a little different from up here. 🚁 At TRIC Robotics, we’re helping farmers protect their crops with UV-light — chemical-free, efficient, and sustainable. 🍓🌱 The future of farming is bright. 💡

Farming looks a little different from up here. 🚁 At TRIC Robotics, we’re helping farmers protect their crops with UV-light — chemical-free, efficient, and sustainable. 🍓🌱 The future of farming is bright. 💡

TRIC Robotics

25,938 次观看 • 11 个月前

FROM INBOX | Harare road users no longer obey traffic lights, which is deeply concerning as it could cost lives. The traffic lights were fully operational at the time, yet on Sunday, February 23, 2025, in Kambuzuma, this driver ran a red light. Sadly, most drivers no longer adhere to traffic signals, and we fear the day when this reckless behavior results in tragedy. Even when the light is red, only a few road users stop. This video serves as evidence of our daily reality on the roads. Zimbabwe Republic Police

FROM INBOX | Harare road users no longer obey traffic lights, which is deeply concerning as it could cost lives. The traffic lights were fully operational at the time, yet on Sunday, February 23, 2025, in Kambuzuma, this driver ran a red light. Sadly, most drivers no longer adhere to traffic signals, and we fear the day when this reckless behavior results in tragedy. Even when the light is red, only a few road users stop. This video serves as evidence of our daily reality on the roads. Zimbabwe Republic Police

𝐂𝐫𝐢𝐦𝐞 𝐖𝐚𝐭𝐜𝐡 𝐙𝐖

52,776 次观看 • 1 年前

3. The most common thing NOBODY talks about is that the only thing Sonic emits from himself is BLUE LIGHT, even in the damn videos wind glazers use is completely sidelined and ignored. Nobody complained about it with Sonic X, nobody complains about it in the modern media, INCLUDING THE BOOST. Like, cmon guys, the lightning is, most likely, a visual representation of this blue light used as an offensive visual, mostly for impact. Yall are taking this way too seriously.

3. The most common thing NOBODY talks about is that the only thing Sonic emits from himself is BLUE LIGHT, even in the damn videos wind glazers use is completely sidelined and ignored. Nobody complained about it with Sonic X, nobody complains about it in the modern media, INCLUDING THE BOOST. Like, cmon guys, the lightning is, most likely, a visual representation of this blue light used as an offensive visual, mostly for impact. Yall are taking this way too seriously.

🗿KAD THE CHAD🗿/OPEN Commissions/

11,529 次观看 • 2 个月前

Gravitational lensing, also known as an Einstein ring This occurs when the strong gravitational pull of a massive object warps spacetime around it so much that light and other forms of electromagnetic radiation are deflected from a straight path. For example, animations show how a black hole passing in front of a galaxy distorts its visible image. An object with such a powerful gravitational pull is called a gravitational lens.

Gravitational lensing, also known as an Einstein ring This occurs when the strong gravitational pull of a massive object warps spacetime around it so much that light and other forms of electromagnetic radiation are deflected from a straight path. For example, animations show how a black hole passing in front of a galaxy distorts its visible image. An object with such a powerful gravitational pull is called a gravitational lens.

Black Hole

36,586 次观看 • 7 个月前

Gravitational lensing, also known as an Einstein ring This occurs when the strong gravitational pull of a massive object warps spacetime around it so much that light and other forms of electromagnetic radiation are deflected from a straight path. For example, animations show how a black hole passing in front of a galaxy distorts its visible image. An object with such a powerful gravitational pull is called a gravitational lens.

Gravitational lensing, also known as an Einstein ring This occurs when the strong gravitational pull of a massive object warps spacetime around it so much that light and other forms of electromagnetic radiation are deflected from a straight path. For example, animations show how a black hole passing in front of a galaxy distorts its visible image. An object with such a powerful gravitational pull is called a gravitational lens.

Black Hole

11,651 次观看 • 7 个月前

Incredible new study at Washington State University found Egyptian Blue emits near‑infrared light 🤯 This is a fragment of ancient Egyptian Blue paint. When researchers hit it with visible light (green, around 530–550 nm), the pigment absorbed it and re‑emitted near‑infrared light at 910–940 nm. Our eyes can’t see NIR, but a modified camera can, so the pigment looks like it’s glowing. Modern NIR‑emitting pigments are used today in anti‑counterfeiting, biomedical imaging, cooling tech, and more. In the hot sun of the Egyptian desert, if a person wore clothing painted in Egyptian Blue, they would stay cooler by radiating some of the absorbed sunlight back out as near‑infrared instead of trapping it as heat.

Incredible new study at Washington State University found Egyptian Blue emits near‑infrared light 🤯 This is a fragment of ancient Egyptian Blue paint. When researchers hit it with visible light (green, around 530–550 nm), the pigment absorbed it and re‑emitted near‑infrared light at 910–940 nm. Our eyes can’t see NIR, but a modified camera can, so the pigment looks like it’s glowing. Modern NIR‑emitting pigments are used today in anti‑counterfeiting, biomedical imaging, cooling tech, and more. In the hot sun of the Egyptian desert, if a person wore clothing painted in Egyptian Blue, they would stay cooler by radiating some of the absorbed sunlight back out as near‑infrared instead of trapping it as heat.

Ancient Hypotheses

181,635 次观看 • 7 个月前

Yosemite’s Firefall waterfall This is a natural phenomenon at Horsetail Fall, which glows orange during mid to late February when sunlight hits the waterfall just right.

Yosemite’s Firefall waterfall This is a natural phenomenon at Horsetail Fall, which glows orange during mid to late February when sunlight hits the waterfall just right.

Rob

18,912 次观看 • 4 个月前