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Naked Science - Lightning

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Naked Science - Lightning

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Six times hotter than the surface of the sun, lightning is one of the world’s strangest phenomena. This film follows the progress of a lightning stroke, from its birth in the clouds, to the weird sounds called whistlers that follow it.

In Australia we follow lightning researchers flying into storm clouds, to discover what triggers a lightning stroke. At the International Lightning Center in Florida we find new research that suggests that cosmic rays from outer space trigger lightning. We meet a golfer struck by lightning, and reveal what happens when you’re hit. Why do some people survive, when others don’t?

One of the weirdest forms of lightning is ball lightning, but is it real, or a myth? We talk to people who have seen it. And we see stunning footage of sprites and other forms of lightning that go up from clouds towards space, and see them recreated in a laboratory. The film climaxes with the discovery that without lightning, we wouldn’t have satellite communication. Our modern way of life would be impossible.
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Britain's Worst Weather - Lightning

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Every other Wednesday we present a new video, so join us to see the truth laid bare...

What do we talk most about in the United Kingdom? The Great British Weather, it’s part of our culture, we’re obsessed with it, but sometimes it can turn from being a mere talking point, into something deadly.

Professor Nick Middleton of Oxford University investigates how the raw electric power of lightning is created, and examines the dire consequences of being struck by a bolt. Plus, why some buildings are set alight during a storm and others are not, and how a plane can fly into such bad weather and remain safe.

Investigating Floods, Storms, Lightning and Snow, this four-part series will combine archive footage of some of the most spectacular weather phenomena ever caught on film with on-location footage of some of the UK's most notorious weather black-spots. Using original footage and Nick Middleton's expert knowledge, the series will provide viewers with the most up-to-date and comprehensive understanding of these ever-increasing natural occurrences.
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[NatGeo] Naked Science: Lightning

Scientists direct artificially/create lightning by shooting rockets tied to metal cables into rain clouds at Fort Blanding Army National Guard Base in Florida, as seen on National Geographic's Naked Science: Lightning.

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Fighter Jets - English Electric Lightning

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The English Electric Lightning is a supersonic jet fighter aircraft of the Cold War era, noted for its great speed. The aircraft had several distinctive design features, the principal of these being the twin engine arrangement, notched delta wing, and low-mounted tailplane. It is the only all-British Mach 2 fighter aircraft and was the first aircraft in the world capable of supercruise. The Lightning was renowned for its capabilities as an interceptor; pilots commonly described it as being saddled to a skyrocket. Following English Electric's integration into the unified British Aircraft Corporation, the aircraft was marketed as the BAC Lightning.

The Lightning was prominently used by the Royal Air Force RAF and the Royal Saudi Air Force. The aircraft was a regular performer at airshows, it is one of the highest-performance aircraft ever used in formation aerobatics. Following retirement in the late 1980s, many of the remaining aircraft became museum exhibits; until 2010, three examples were kept flying at Thunder City in Cape Town, South Africa. In September 2008, the Institution of Mechanical Engineers conferred on the Lightning its Engineering Heritage Award at a ceremony at BAE Systems' site at Warton Aerodrome.

Clip from the documentary “Tycoon Toys - Fighter Jets”.

Watch it here - Coming soon!

What do the super-rich choose to spend their hard-won zillions on? We meet individuals who have a particular penchant for owning, driving and firing huge pieces of ex-military hardware, from field guns to tanks to fighter jets. Tycoon Toys goes on a journey to watch them at play.
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Naked Science : Lightning

Aisyah Novianti (1816442003)
Pendidikan IPA ICP 2018
Fakultas Matematika dan Ilmu Pengetahuan Alam
Universitas Negeri Makassar

Struck By Lightning (Documentary)

This upload is 100% Non Profit.

Naked Science - Deadliest Planets

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What are the most violent and dangerous planets in our Solar System?

One day the time may come when humans have developed technology advanced enough to send sections of Earth’s population to settle on other planets. What kinds of world can we expect to find, how do they compare with our own, and what measures would we need to take to adapt to their alien environments? Naked Science takes us on journey through the Solar System and beyond, examining some of the most extreme characteristics of our planetary neighbours.

What Happens When You're Struck By Lightning? | The Human Body

Getting stuck by lightning is rough. It can burn hotter than the sun, scar your body, and even blow off your clothes. Even worse, it kills about 47 Americans per year. Although 90% of those struck survive, it's still worth knowing how to avoid getting a heavy dose of sky electricity.

Following is the transcript of the video:

Contrary to popular belief, lightning strikes aren’t always a death sentence. In fact, about 90 percent of people in the US who are struck actually survive.

Still, victims rarely walk away unscathed, and the damage can be permanent.

Lightning triggers 75,000 forest fires in the US each year and can split entire trees down the middle in a split second.

So it’s frightening to imagine what it does inside a human body.

The good news is that you won’t get cooked Wile E Coyote-style, but it can still do damage.

For starters, lightning carries between 1 to 10 billion joules of energy — enough to power a 100-watt bulb for at least 3 months. When that amount of electricity enters your body,  it short-circuits the small electrical signals that run your heart, lungs, and nervous system.

This can lead to cardiac arrest, seizures, brain injury, spinal cord damage, and even amnesia.

But electricity isn’t your only problem. Lightning is blisteringly hot. In under a second, it can heat the surrounding air to temperatures 5X hotter than the sun’s surface.

This causes a rapid expansion of air, which leads to a shock wave that we hear as thunder.

It has been calculated that someone standing within 30 feet of a lightning strike point can experience a blast wave equivalent to a 5kg TNT bomb (Blumenthal).

The intense heat, light, and electricity can also damage your eyes. In fact, it can bore holes in your retina and can cause cataracts within days or weeks.

Other side-effects of lightning can include impotence in men and overall decreased libido. That’s just what happens on the inside!

As the lightning moves toward the surface, it can force red blood cells out of your capillaries, into your epidermis….like a bruise. These intricate designs are called Lichtenberg figures.

The intense temperatures can also heat up any metal you might be wearing, causing third-degree burns and can also rapidly vaporize the rainwater or sweat on your skin. The resulting steam explosion may blow off your clothes and shoes leaving you nearly naked!

On average 47 people in the US are killed by lightning each year. So, you might be wondering, “How do I make sure I’m not that guy?”

For starters, check weather forecasts ahead of time, and stay indoors during a storm. But if you’re stuck outside, avoid isolated trees, poles, and open fields, and run as fast as you can towards safety.

You’re best off in a developed building or a hard-topped metal vehicle. So stay calm and just remember: “When thunder roars go indoors!”

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What Happens When You're Struck By Lightning? | The Human Body

Naked Science - Earth's Core

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Every other Wednesday we present a new video, so join us to see the truth laid bare...

There is a place on Earth that we have never seen. It is a place of unimaginable heat and pressure, where no life could survive. Yet without it, we would perish for it holds the key to our precarious existence on this planet.

2000 miles below the Earth's surface, there is a vast ocean of molten iron. The spinning outer core of the Earth generates a protective magnetic shield around the planet, defending life from lethal space radiation. But now there is startling data that it could be about to stop defending us. Naked Science is taking you on a journey to the centre of the Earth.

Naked Science - Moon Mysteries

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Every other Wednesday we present a new video, so join us to see the truth laid bare...

The moon is far more than just a beautiful object in the night sky.

Ever since its creation 4.5 billion years ago the moon has been edging away from Earth into space. Throughout its journey, it has influenced our planet in different ways. But one things clear, without it life would never have emerged on Earth.

4.5 billion years ago the moon forms when another planet slams into the early Earth. The impact knocks our planet “off-balance” onto an axis of 23 degrees, which we still rotate around today. This is what gives us our seasons. Without it we would have no summers, springs, winters or falls.

4 billion years ago the solar system endures the most violent meteorite bombardment in its history, the Lunar Cataclysm. The Earth, being 50 times bigger than the moon, exerts a massive gravitational pull on incoming space debris. Because the moon is still so close to Earth it too gets hit. 99% of all craters on the lunar surface visible today are a result of this bombardment.

3 billion years ago the Earth has water and oceans. Because the moon is far closer its gravitational pull is far stronger on the Earth. The tides it creates are thousands of feet high and smash hundreds of miles inland every day. Scientists believe that these tides feed the Primordial Soup with the minerals required to start life. Without them only the most basic microbes would be on Earth today.

Today the moon has the same gravitational pull as a mosquito landing on your head, yet some people still believe it can influence our planet in bizarre ways.

The San Francisco Police Department tell us how crime appears to soar during a full moon. But the scientific data suggests otherwise, studies show no correlation between the Full Moon and violence. Naked Science investigates.

Scientific research into the moon is allowing some scientists to predict when natural disasters will strike. Some researchers believe that when the sun and moon align and pull together on the Earth they can trigger both earthquakes and volcanic eruptions.

In the future the moon will move so far from Earth that it will affect the fine balance of our planet, sending our climate tumbling out of control.
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Naked Science - Colliding Continents

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How were the continents formed?

We walk over them without a second thought, but where did the land beneath our feet come from? We go back in time to the oldest rocks on earth, to see how the first continents formed on our fledgling planet. We see how continents are just lighter rocks, floating on a layer of denser molten rock, the mantle.

Travelling to the bottom of the Grand Canyon we follow the process of erosion and sedimentation that created the landscape we see today. At the Giant’s Causeway, in Ireland, we tell the story of how a continent split into two, creating America and Europe, and in the Himalayas, we see how two continents colliding create the tallest mountains on earth.

But what of the future? Using computer simulations, we trace the progress of the continents over the next 250 million years and discover that they will all merge into one.

Naked Science - Monster Black Holes

Naked Science - Monster Black Holes

Follow a basic explanation of what a black hole is an how it forms, this program explores what happens near and even inside a black hole based on current theories of gravitation. The great lengths scientists have to gone to to test the theories are described.

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Black Holes

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Every other Wednesday we present a new video, so join us to see the truth laid bare...

Somewhere in our galaxy, at some time in the future, a spacecraft from Earth will encounter the most dangerous object in the Universe. A stunning visual journey into black holes, their structure and their creation.

A black hole is a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing, including particles and electromagnetic radiation such as light, can escape from inside it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

Naked Science Moon Mysteries

Naked Science - Birth of the Earth

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Every other Wednesday we present a new video, so join us to see the truth laid bare...

How did the Earth evolve to support life.

Our planet now supports a huge diversity of living creatures requiring very special conditions, but what was the series of events that brought this unique set of conditions together? What did it take to make a world that would support human life? Naked Science takes an imaginary ‘human’ time traveller on a journey back to the moment of formation of our solar system. We meet the scientists who are carrying out their own detective work, uncovering the clues around the world today into what our planet was like 4 and a half billion years ago.

Our journey begins with the astonishing story of how a giant cloud of interstellar dust and gas collapsed to form the sun and planets. We discover that the intense heat of the early Earth created a molten iron core. This generated a magnetic shield around our planet that protects us, to this day, from the sun’s deadliest particles.

Many of the features we take for granted on our living planet were forged in the most violent event in our planet’s history. Early in its life, the Earth collided with another planet. Planetary Scientist Robin Canup has modelled the impact using supercomputers. She reveals that the resulting fireball was so energetic it melted the Earth and created the moon. This dramatic impact gave us our tides and seasons.

We wouldn’t have life today without water. But where our water came from is a mystery that has long puzzled scientists. At a NASA research laboratory, Michael Zolensky studies a recently discovered meteorite that supports the view that water came from space.

For the first half of its history the Earth had an atmosphere of methane and carbon dioxide we would find impossible to breathe. One clue as to how the earth acquired its oxygen can be found in Australia. Shark Bay in Western Australia is home to strange bacterial mounds called stromatolites. The bacteria in these objects are pumping out oxygen. A few hundred miles away geologist Martin Van Kranendonk shows us a fossil stromatolite, the world’s oldest fossil. The evidence suggests that these strange objects are responsible for creating the air we breathe.
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Naked Science - Comets

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Harbingers of doom or givers of life?

Comets, distant travellers from the outer reaches of our solar system, have captured the imagination of man and have long been shrouded in mystery. Now through Earth based observations and an increasing number of space probes, their origins and nature are becoming unveiled. Naked Science explores behind the legend to reveal what a comet actually is, what secrets they hold for our understanding of how the solar system was formed; shed light on the theory that they brought the building blocks of life to earth and their potential for wiping out life as we know it.

Naked Science - Death of the Sun

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Every other Wednesday we present a new video, so join us to see the truth laid bare...

The Sun is the most powerful force in our solar system. It generates the heat and light that sustains us. Without it we wouldn’t have life on Earth. But the Sun is violent and volatile and is becoming more dangerous as it ages.

Naked Science explores the life and death of the Sun. We explore what will happen in the future as the Sun ages, and how our lives linked to the Sun’s life cycle.

Firstly we want to understand how the Sun was created from a giant cloud of dust and gas. Scientists pretty much agree on the theory but physical evidence is hard to come by. Naked Science meets scientists at Johnson Space Center who have been working on a ten year mission to bring a piece of the Sun back to Earth. How do scientists collect samples of the Sun when a probe could never get near the Sun’s surface? We follow NASA’s dare devil mission to capture the samples.

Today we rely on the Sun to live. It’s energy fuels trees and plants which are essential for the food chain we all depend upon. But how do we get the energy? Naked Science explores the incredible journey that the particles of light from the Sun have to make to earth to deliver their energy.

How old is the Sun? This is a question which has fascinated scientists for a long time. Scientists have now established the Sun’s age with the aid of one remarkable fact that the Sun sings. We visit Big Bear Solar Observatory in California to meet one of the scientists who has been at the forefront of using the Sun’s sounds to determine its age.

The Sun’s warmth and light helped life on Earth to begin but it can also play havoc with our modern way of life. Billions of tons of plasma erupting from the sun send powerful storms hurtling through our solar system. We visit the Space Environment Center in Boulder, Colorado where they try to predict the sun’s violent moods. 1989 brought one of the most dramatic space storms and Naked Science uncovers the events which took place on the Earth. But what lies behind the explosive events on the Sun. We travel to the California Institute of Technology in Los Angeles where they are trying to understand the science behind the explosions by creating them in the laboratory.

But what about the risks of solar storms to astronauts in Space? Naked Science meets Michael Foale who was directly in the line of fire on the International Space Station during the intense solar activity in 2003. There is one solar event astronauts can’t be protected from. A superflare. Superflares are up to 10 million times more energetic than the most powerful solar flares. Naked Science journeys to Louisiana to meet an astrophysicist who has found evidence of nine stars that have experienced superflares. What if our sun ever produced a superflare, what would happen to life on earth?

We know when the sun was born, how it nurtured us and how it has thrown a fair amount of danger our way. But how and when will it die and will the Earth survive?

Naked Science - Pyramids

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Every Wednesday we present a new video, so join us to see the truth laid bare...

For over four and a half thousand years the pyramids of Egypt have stood as wonders of the world. The facts are astonishing, the Great Pyramid alone weighs almost six million tons and contains over 2.3 million stone blocks. Naked Science sets out to uncover four great mysteries that still surround the pyramids, how were they built, who built them, why were they built, and what secrets may still lie hidden within their stones. As four millennia and countless generations stand between us and the men who built the pyramids we have to study the buildings themselves to uncover the answers.

With British engineer Denys Stocks we learn the art of pyramid building. Stocks has spent twenty years mastering the techniques used by the ancient workmen and shows how such vast quantities of stone were quarried, transported and fitted by a civilisation that had not even invented the wheel. To show the scale of the achievement we asked construction manager and pyramid scholar Craig Smith to calculate what it would take to build a pyramid in today’s money.

We may know the names of the pharaohs who commissioned the pyramids but who actually hauled the blocks. Legends have always held that slaves built the pyramids but we venture into the science of Forensic Egyptology to discover the truth. Mark Lehner discovered the town of the pyramid builders while Zahi Hawass takes us on a tour of their tombs.

There may be few records of how the pyramids were built but hieroglyphic texts within some pyramids hint at their reveal purpose. Salima Ikram and Jim Allen help us find for the reason why the pyramids were built within these spells and incantations. However Robert Bauval, believes there may be deep connections between the pyramids and astronomy. He believes links to the stars are hidden within their stones and chambers.

Finally we follow work in pyramid exploration as teams hunt for hidden chambers and use robots to explore the mysterious shafts at the centre of the Great Pyramid of Giza.

Discovery Channel - Raging Planet: Lightning VO (Fuerzas de la naturaleza: Rayos VO)

Discovery Channel - Raging Planet: Lightning VO (Fuerzas de la naturaleza: Rayos VO)

Incredible Slow Motion Lightning Strike! (1 sec. = 3 min!)

Incredible footage of a lightning strike slowed down. One strike of lightning (1 second) turns into 3 minutes of footage. See what few people ever see!

Lightning physicist Vladislav Mazur and meteorologist Tom Warner watch a video of a lightning strike that has been slowed down so 1 second of footage is played back as 6 minutes of film.

Vlad Mazur, a scientist with the National Severe Storms Laboratory in Norman, Okla., was the first to study storms using a 1,000-image-per-second camera in the early 1990s.

Warner says that it has been only in the past three or four years that technology has enabled him and other scientists to use high-speed video to study lightning, when the speed and therefore the resolution increased significantly to allow for meaningful resolutions to be captured at speeds above 5,000 images per second.

From National Geographic Naked Science - Lightning Chasers.

Produced by Cosmos Factory for ORF UNIVERSUM, ZDF and NATIONAL GEOGRAPHIC CHANNELS
© ORF 2010
All Rights Reserved


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