Loading video...

Video Failed to Load

Go Home

When you look inside a reactor’s core, do you notice that captivating blue glow? That is the ‘Cherenkov effect’ at work! It is named after the physicist who was born #onthisday in 1904. While studying the effects of radiation emitted by sources such as radium, passing through various fluids,...

iaeaorg's profile picture

IAEA - International Atomic Energy Agency ⚛️

291,956 subscribers

10,756 views • 1 month ago •via X (Twitter)

#onthisday
LIVE

Anya Rossi• Live Now

Private livecam show

4 Comments

Cosmology Fact Check's profile picture
Cosmology Fact Check1 month ago

Would the water be radioactive?

錬金術師's profile picture
錬金術師1 month ago

ほんとだ、自分もそう思う

柏木's profile picture
柏木1 month ago

今日も推し活😌

Lynda Lovon's profile picture
Lynda Lovon1 month ago

If you were to look inside a reactor core you would fucking die. What is wrong with you? You are a failed agency responsible for the proliferation of nuclear weapons in the world. You must be disbanded immediately from the @UN !!!

Related Videos

Electrons faster than light? Yes, sort of. The Cherenkov Effect occurs when a charged particle travels through a medium faster than the speed of light in that medium. Particles can't travel faster than light in a vacuum, but they can exceed it in a specific medium.
0:25

Electrons faster than light? Yes, sort of. The Cherenkov Effect occurs when a charged particle travels through a medium faster than the speed of light in that medium. Particles can't travel faster than light in a vacuum, but they can exceed it in a specific medium.

Brian Roemmele

144,653 views • 1 year ago

Can particles move faster than light? Nobel Prize employee Olof is here to explain more about how that's possible in Cherenkov radiation – the discovery that received the 1958 physics prize. Learn more about this effect: Reactor Video Credits: Sandia National Laboratories; IAEA Office of Public Information and Communication
1:22

Can particles move faster than light? Nobel Prize employee Olof is here to explain more about how that's possible in Cherenkov radiation – the discovery that received the 1958 physics prize. Learn more about this effect: Reactor Video Credits: Sandia National Laboratories; IAEA Office of Public Information and Communication

The Nobel Prize

37,544 views • 2 months ago

What's that beautiful blue glow around a nuclear reactor core? Cherenkov radiation, charged particles from fission racing faster than light through water, creating an electromagnetic "sonic boom" of light. Fun fact: It's the same effect that makes spent fuel pools glow blue and was key to discovering neutrinos. Writer: Lucas
0:47

What's that beautiful blue glow around a nuclear reactor core? Cherenkov radiation, charged particles from fission racing faster than light through water, creating an electromagnetic "sonic boom" of light. Fun fact: It's the same effect that makes spent fuel pools glow blue and was key to discovering neutrinos. Writer: Lucas

Mario Nawfal

47,033 views • 2 months ago

Did you know that a charged particle can actually outrun light? Not light in a vacuum of course. That limit still stands. But inside a dielectric, light travels more slowly. If an electron moves through that material faster than the local phase velocity, something incredible happens... the EM field can no longer rearrange itself smoothly around the particle. A coherent shock front forms. This is known as Cherenkov radiation, named after Russian physicist Pavel Cherenkov who experimentally observed the effect in the 1930s.
0:30

Did you know that a charged particle can actually outrun light? Not light in a vacuum of course. That limit still stands. But inside a dielectric, light travels more slowly. If an electron moves through that material faster than the local phase velocity, something incredible happens... the EM field can no longer rearrange itself smoothly around the particle. A coherent shock front forms. This is known as Cherenkov radiation, named after Russian physicist Pavel Cherenkov who experimentally observed the effect in the 1930s.

Mathelirium

97,079 views • 26 days ago

We saw that with Cherenkov Radiation, a charged particle radiates when it outruns light in a medium. A charged particle also radiates when a magnetic field bends its path. This is called Synchrotron Radiation. The faster the particle moves, the more strongly emitted radiation is concentrated in the forward tangential direction.
0:30

We saw that with Cherenkov Radiation, a charged particle radiates when it outruns light in a medium. A charged particle also radiates when a magnetic field bends its path. This is called Synchrotron Radiation. The faster the particle moves, the more strongly emitted radiation is concentrated in the forward tangential direction.

Mathelirium

21,526 views • 21 days ago

DEW. Tyndall effect. The Tyndall Effect occurs when light is scattered by particles colloidal. Water enhances light, imagine the destructive power of something like that in greater proportions.
0:28

DEW. Tyndall effect. The Tyndall Effect occurs when light is scattered by particles colloidal. Water enhances light, imagine the destructive power of something like that in greater proportions.

Bronze Giant

74,092 views • 1 year ago

The Rehbinder effect is a phenomenon in physics that reduces the hardness and ductility of a material by a surfactant film. A surfactant is a substance that lowers the surface tension of a liquid, such as water. When a ceramic cup is submerged in water, the water acts as a surfactant and weakens the bonds between the atoms on the surface of the cup. This makes it easier to pierce the cup with a nail without breaking it.
1:02

The Rehbinder effect is a phenomenon in physics that reduces the hardness and ductility of a material by a surfactant film. A surfactant is a substance that lowers the surface tension of a liquid, such as water. When a ceramic cup is submerged in water, the water acts as a surfactant and weakens the bonds between the atoms on the surface of the cup. This makes it easier to pierce the cup with a nail without breaking it.

Growing Curiosity

628,647 views • 2 years ago

In 1887, Heinrich Hertz noticed that some light made it easier for electrons to escape a metal surface, but the pattern made no sense under Classical Physics. The surprise was that very bright red light could fail, while dim blue or ultraviolet light worked immediately. Einstein explained this in 1905 by proposing that light comes in energy packets, and only packets with enough energy can knock electrons free. That was the Photoelectric Effect, and it helped earn him the 1921 Nobel Prize in Physics.
0:48

In 1887, Heinrich Hertz noticed that some light made it easier for electrons to escape a metal surface, but the pattern made no sense under Classical Physics. The surprise was that very bright red light could fail, while dim blue or ultraviolet light worked immediately. Einstein explained this in 1905 by proposing that light comes in energy packets, and only packets with enough energy can knock electrons free. That was the Photoelectric Effect, and it helped earn him the 1921 Nobel Prize in Physics.

Mathelirium

64,904 views • 6 months ago

THE SOLAR SYSTEM CAUSES CLIMATE CHANGES, CO2 FOLLOWS Ice core studies have proven that warming precedes rises in CO2, so we can deduce that warming causes CO2, and not the other way round as Al Gore claimed. This was a political agenda that skewed science. This happens because the Oceans absorb CO2 as they cool, and release it as they warm up. 96% of CO2 in the atmosphere is emitted naturally. 70% of CO2 in the atmosphere has a natural origin. The greenhouse gas effect is caused by water vapour by 80%. CO2 is not the cause of warming, but it's the effect, as proven by ice core studies.
6:40

THE SOLAR SYSTEM CAUSES CLIMATE CHANGES, CO2 FOLLOWS Ice core studies have proven that warming precedes rises in CO2, so we can deduce that warming causes CO2, and not the other way round as Al Gore claimed. This was a political agenda that skewed science. This happens because the Oceans absorb CO2 as they cool, and release it as they warm up. 96% of CO2 in the atmosphere is emitted naturally. 70% of CO2 in the atmosphere has a natural origin. The greenhouse gas effect is caused by water vapour by 80%. CO2 is not the cause of warming, but it's the effect, as proven by ice core studies.

Robin Monotti

44,083 views • 28 days ago

The Rehbinder effect in physics is the reduction in the hardness and ductility of a material, particularly metals, by a surfactant film. The effect is named for Soviet scientist Piotr Aleksandrovich Rehbinder, who discovered the effect in 1928.
0:34

The Rehbinder effect in physics is the reduction in the hardness and ductility of a material, particularly metals, by a surfactant film. The effect is named for Soviet scientist Piotr Aleksandrovich Rehbinder, who discovered the effect in 1928.

World of Engineering

511,894 views • 1 year ago

The double-slit experiment is a key demonstration in quantum physics that reveals the strange behavior of particles like electrons and photons. In the experiment, particles are fired at a barrier with two slits, and a screen records where they land. If both slits are open and no measurement is made, the particles form an interference pattern, like waves overlapping, even when sent one at a time. This suggests that each particle passes through both slits at once in a state called superposition. However, if detectors are placed at the slits to observe which path the particle takes, the interference pattern disappears. The particles then behave like classical objects, going through one slit or the other. This change in behavior simply from observing the system is known as the observer effect, and it highlights a fundamental principle of quantum mechanics: measurement affects the outcome. The experiment challenges our understanding of reality, showing that at the quantum level, particles don't have definite states until they are observed 🤓
0:24

The double-slit experiment is a key demonstration in quantum physics that reveals the strange behavior of particles like electrons and photons. In the experiment, particles are fired at a barrier with two slits, and a screen records where they land. If both slits are open and no measurement is made, the particles form an interference pattern, like waves overlapping, even when sent one at a time. This suggests that each particle passes through both slits at once in a state called superposition. However, if detectors are placed at the slits to observe which path the particle takes, the interference pattern disappears. The particles then behave like classical objects, going through one slit or the other. This change in behavior simply from observing the system is known as the observer effect, and it highlights a fundamental principle of quantum mechanics: measurement affects the outcome. The experiment challenges our understanding of reality, showing that at the quantum level, particles don't have definite states until they are observed 🤓

𝚃𝙷𝙴 𝚆𝙷𝙸𝚃𝙴 𝚁𝙰𝙱𝙱𝙸𝚃

51,041 views • 8 months ago

THE CONTRASTING EFFECTS OF BLUE AND RED/NIR LIGHT ON THE MITOCHONDRIA. - Recent research published this year in Nature: Scientific Reports demonstrates the effects that light in the built environment has on human health. Our modern build environment is dominated by short-wavelength light from LEDs and fluorescent lighting. This can have deleterious effects on the mitochondria. Adding to this effect is the lack of long-wavelength light from sources like the sun and incandescent lighting bulbs. These long light wavelengths have a beneficial effect on mitochondria function and overall human health. The lack of them in our modern built environment, seems to be impacting public health in a delirious fashion. Two recent papers to read: 1. 2.
4:30

THE CONTRASTING EFFECTS OF BLUE AND RED/NIR LIGHT ON THE MITOCHONDRIA. - Recent research published this year in Nature: Scientific Reports demonstrates the effects that light in the built environment has on human health. Our modern build environment is dominated by short-wavelength light from LEDs and fluorescent lighting. This can have deleterious effects on the mitochondria. Adding to this effect is the lack of long-wavelength light from sources like the sun and incandescent lighting bulbs. These long light wavelengths have a beneficial effect on mitochondria function and overall human health. The lack of them in our modern built environment, seems to be impacting public health in a delirious fashion. Two recent papers to read: 1. 2.

Jonathan Jarecki

17,850 views • 7 months ago

Astrophysicist Neil deGrasse Tyson explains, the faster you move through space, the slower you move through time. As you approach the speed of light, time stretches and slows down until it reaches the ultimate cosmic speed limit, where time completely stops. This means that for a photon of light created at the Big Bang 13.8 billion years ago, the exact moment it was born is the exact same instant it strikes your eye; a mind-bending reality proving that for light, the entire history of the universe happens in a single, frozen moment.
0:58

Astrophysicist Neil deGrasse Tyson explains, the faster you move through space, the slower you move through time. As you approach the speed of light, time stretches and slows down until it reaches the ultimate cosmic speed limit, where time completely stops. This means that for a photon of light created at the Big Bang 13.8 billion years ago, the exact moment it was born is the exact same instant it strikes your eye; a mind-bending reality proving that for light, the entire history of the universe happens in a single, frozen moment.

Cosmos Archive

88,054 views • 5 months ago

While travelling to Tau Ceti the Hail Mary would reach 99.5% of the speed of light. At that speed the aberration bends most of the light in front of it, and the combination of beaming and blue shift is as bright as indoor lighting... but very blue.
0:39

While travelling to Tau Ceti the Hail Mary would reach 99.5% of the speed of light. At that speed the aberration bends most of the light in front of it, and the combination of beaming and blue shift is as bright as indoor lighting... but very blue.

Scott Manley

168,288 views • 1 month ago

"For a nation to progress it is important for people to spend time on science, mathematics and literature instead of spending time showing that 5000 years ago their ancestors did science, mathematics and literature." J J Thomson won the 1906 (not 1907 as claimed) Nobel Prize in Physics "in recognition of the great merits of his theoretical and experimental investigations on the conduction of electricity by gases." His son, G P Thomson (not P J Thomson) won the Nobel Prize in Physics in 1937 for showing "diffraction properties" of electrons. Erwin Schrodinger never called electrons wavicles and it was not in 1932, but 1926, and Nobel Prize in 1933, for the Schrodinger wave equation describing the behaviour of a particle in a field of force or the change of a physical quantity over time. The equation showed that electrons can have the properties of either waves or particles, and their state can only be calculated with probability This discovery settled the dispute over whether quantum objects such as electrons, atoms, or molecules were waves or particles. Werner Heisenberg never said "we don't know what an electron is. He was awarded the Nobel Prize in Physics in 1932 (not 1956) for his theory of quantum mechanics and its applications, including the discovery of allotropic forms of hydrogen. The original concept of the photon was developed by Albert Einstein. In 1926 the optical physicist Frithiof Wolfers and the chemist Gilbert N. Lewis coined the name photon for these particles. Photons have nothing to do with electrons that was the point of discussion until now. The Hindu scriptures have nothing scientific in them. Absolutely nothing. Like all other Holy scriptures, it's fiction. B M Hegde was a reputable Cardiologist. But now he's an Ayurveda sympathizing quack who has rented out his brain in memory of ancient Sages who wrote fictionalized observations from primal theories. B M Hegde is now a shell of his former self mostly guided by spinal level thinking, brought on by senility and loss of logic. Stop circulating his videos on social media. He's merely the remnant of an intelligence from a bygone era.
1:23

"For a nation to progress it is important for people to spend time on science, mathematics and literature instead of spending time showing that 5000 years ago their ancestors did science, mathematics and literature." J J Thomson won the 1906 (not 1907 as claimed) Nobel Prize in Physics "in recognition of the great merits of his theoretical and experimental investigations on the conduction of electricity by gases." His son, G P Thomson (not P J Thomson) won the Nobel Prize in Physics in 1937 for showing "diffraction properties" of electrons. Erwin Schrodinger never called electrons wavicles and it was not in 1932, but 1926, and Nobel Prize in 1933, for the Schrodinger wave equation describing the behaviour of a particle in a field of force or the change of a physical quantity over time. The equation showed that electrons can have the properties of either waves or particles, and their state can only be calculated with probability This discovery settled the dispute over whether quantum objects such as electrons, atoms, or molecules were waves or particles. Werner Heisenberg never said "we don't know what an electron is. He was awarded the Nobel Prize in Physics in 1932 (not 1956) for his theory of quantum mechanics and its applications, including the discovery of allotropic forms of hydrogen. The original concept of the photon was developed by Albert Einstein. In 1926 the optical physicist Frithiof Wolfers and the chemist Gilbert N. Lewis coined the name photon for these particles. Photons have nothing to do with electrons that was the point of discussion until now. The Hindu scriptures have nothing scientific in them. Absolutely nothing. Like all other Holy scriptures, it's fiction. B M Hegde was a reputable Cardiologist. But now he's an Ayurveda sympathizing quack who has rented out his brain in memory of ancient Sages who wrote fictionalized observations from primal theories. B M Hegde is now a shell of his former self mostly guided by spinal level thinking, brought on by senility and loss of logic. Stop circulating his videos on social media. He's merely the remnant of an intelligence from a bygone era.

TheLiverDoc™

204,568 views • 2 years ago

The Man Who Runs CERN Said Something That Nobody Talks About What is CERN doing? You know that feeling when you remember something with complete certainty and then find out it never happened? Not just you. Millions of people. The same specific wrong memory. Shared by strangers who never met and never compared notes. That is the Mandela Effect. Most people treat it as a fun internet thing. But here is what most people are not connecting. The most powerful particle accelerator ever built, a machine designed to smash atoms apart at nearly the speed of light and access dimensions of reality we have never observed — came online in 2008. The Mandela Effect as a documented widespread phenomenon started in 2009. And the man running the experiments said something publicly that year that almost nobody has heard. In this video we get into all of it. The machine. The memories. The quote. And the question that I think deserves a serious answer.
9:36

The Man Who Runs CERN Said Something That Nobody Talks About What is CERN doing? You know that feeling when you remember something with complete certainty and then find out it never happened? Not just you. Millions of people. The same specific wrong memory. Shared by strangers who never met and never compared notes. That is the Mandela Effect. Most people treat it as a fun internet thing. But here is what most people are not connecting. The most powerful particle accelerator ever built, a machine designed to smash atoms apart at nearly the speed of light and access dimensions of reality we have never observed — came online in 2008. The Mandela Effect as a documented widespread phenomenon started in 2009. And the man running the experiments said something publicly that year that almost nobody has heard. In this video we get into all of it. The machine. The memories. The quote. And the question that I think deserves a serious answer.

Jordan Chain

59,949 views • 24 days ago

Alfred Hitchcock explains the Kuleshov effect in cinema. The Kuleshov Effect is one of the most influential concepts in film theory, demonstrating the power of editing to create meaning and manipulate our perception. Named after Russian filmmaker and theorist Lev Kuleshov, this phenomenon underscores how the juxtaposition of images can evoke emotions, construct narratives, and shape different interpretation of a scene. The meaning of the Kuleshov Effect lies in its assertion that a shot’s significance is shaped not just by its individual content but by its context within a sequence. By juxtaposing two unrelated images, filmmakers can guide the audience’s interpretation, creating specific emotions, thoughts, or narratives through the power of editing. For instance, if an image of a neutral face is followed by a shot of food, the audience might interpret the person as feeling hungry. If the same neutral face is paired with an image of a coffin, the interpretation shifts to grief. This principle demonstrates how editing shapes the psychological impact of a film, guiding the our perception and emotional engagement.
0:55

Alfred Hitchcock explains the Kuleshov effect in cinema. The Kuleshov Effect is one of the most influential concepts in film theory, demonstrating the power of editing to create meaning and manipulate our perception. Named after Russian filmmaker and theorist Lev Kuleshov, this phenomenon underscores how the juxtaposition of images can evoke emotions, construct narratives, and shape different interpretation of a scene. The meaning of the Kuleshov Effect lies in its assertion that a shot’s significance is shaped not just by its individual content but by its context within a sequence. By juxtaposing two unrelated images, filmmakers can guide the audience’s interpretation, creating specific emotions, thoughts, or narratives through the power of editing. For instance, if an image of a neutral face is followed by a shot of food, the audience might interpret the person as feeling hungry. If the same neutral face is paired with an image of a coffin, the interpretation shifts to grief. This principle demonstrates how editing shapes the psychological impact of a film, guiding the our perception and emotional engagement.

Auteur House

30,487 views • 1 month ago

Iranian scientist Kaveh Madani said on Wednesday in an interview with Iran International after being named the 2026 Stockholm Water Prize laureate that he shared the award with the people of Iran who supported him. Madani, director of the United Nations University Institute for Water, Environment and Health, was named the recipient of the prize, often described as the “Nobel Prize of Water,” in recognition of his work on global water management.
1:06

Iranian scientist Kaveh Madani said on Wednesday in an interview with Iran International after being named the 2026 Stockholm Water Prize laureate that he shared the award with the people of Iran who supported him. Madani, director of the United Nations University Institute for Water, Environment and Health, was named the recipient of the prize, often described as the “Nobel Prize of Water,” in recognition of his work on global water management.

Iran International English

24,186 views • 6 months ago

When water enters a narrower section of a pipe, its velocity increases and the static pressure decreases. This crucial phenomenon, known as the Venturi effect, is fundamental to understanding fluid dynamics and has important applications in various technologies.
0:24

When water enters a narrower section of a pipe, its velocity increases and the static pressure decreases. This crucial phenomenon, known as the Venturi effect, is fundamental to understanding fluid dynamics and has important applications in various technologies.

Architecture Presentation

16,955 views • 20 days ago