homehome Home chatchat Notifications


Amazing lighting strikes filmed at 7,000 frames per second

Researchers at the Florida Institute of Technology had an awesome day on the field with their 7,000 frames per second high-speed cameras.

Tibi Puiu
May 26, 2016 @ 3:17 pm

share Share

Researchers at the Florida Institute of Technology had an awesome day on the field with their 7,000 frames per second high-speed cameras. They set their gear near the university’s Melbourne campus and waited for the thunderstorm show to work its magic.

To the naked eye, a lightning bolt comes and goes in a flash. But technology comes to the rescue, and this brilliant video shows just how intensely intricate a lightning strike can be as it discharges massive amounts of energy. The playback speed of the video is 700 fps.

[panel style=”panel-info” title=”What is lightning” footer=””]Lightning is a giant discharge of electricity accompanied by a brilliant flash of light and a loud crack of thunder. The spark can reach over five miles (eight kilometers) in length, raise the temperature of the air by as much as 50,000 degrees Fahrenheit (27,700 degrees Celsius), and contain a hundred million electrical volts. Lightning may actually be the ultimate life bringer, though it may sometimes cause fatalities.  The immense heat and energy discharged during a strike can convert elements into compounds that are found in organisms, so during the planet’s primal period lightning may have helped spur life – like a defibrillator.[/panel]

[panel style=”panel-success” title=”How lightning forms” footer=””]Every day, some four million lightning strikes hit the surface of the planet. Despite this, how lightning – and subsequently thunder – is formed is not completely understood at a physical level. We know one thing for sure: it comes from clouds (dust, water and ice). Ice inside the cloud rubs against each other becoming electrically polarized or charged (the exact mechanism is a bit fuzzy, which is why the whole thing is debatable). The lighter ice will move upwards while the heavier ice will stay below separating the negative and positive charges.

Just like the cloud, because there’s a lot of charge hovering around, the air below the clouds also become ionized. In turn, the ionized air charges air particle further below in a cascading effect until it eventually reaches the ground. This happens very quickly, and the sections of ionized air look very much like electrical sparks or the static electricity released when you rub your sweater against a balloon. The  ground is very conductive compared to air, and will give up a large amount of electric charge into this completed circuit (between the ground and the cloud) — this is called the return stroke and is basically what you see as lightning. This ionizes the air completely between the ground and the cloud, and this is the part you can see for miles around.[/panel]

 

share Share

Archaeologists May Have Found Odysseus’ Sanctuary on Ithaca

A new discovery ties myth to place, revealing centuries of cult worship and civic ritual.

The World’s Largest Sand Battery Just Went Online in Finland. It could change renewable energy

This sand battery system can store 1,000 megawatt-hours of heat for weeks at a time.

A Hidden Staircase in a French Church Just Led Archaeologists Into the Middle Ages

They pulled up a church floor and found a staircase that led to 1500 years of history.

The World’s Largest Camera Is About to Change Astronomy Forever

A new telescope camera promises a 10-year, 3.2-billion-pixel journey through the southern sky.

AI 'Reanimated' a Murder Victim Back to Life to Speak in Court (And Raises Ethical Quandaries)

AI avatars of dead people are teaching courses and testifying in court. Even with the best of intentions, the emerging practice of AI ‘reanimations’ is an ethical quagmire.

This Rare Viking Burial of a Woman and Her Dog Shows That Grief and Love Haven’t Changed in a Thousand Years

The power of loyalty, in this life and the next.

This EV Battery Charges in 18 Seconds and It’s Already Street Legal

RML’s VarEVolt battery is blazing a trail for ultra-fast EV charging and hypercar performance.

DARPA Just Beamed Power Over 5 Miles Using Lasers and Used It To Make Popcorn

A record-breaking laser beam could redefine how we send power to the world's hardest places.

Why Do Some Birds Sing More at Dawn? It's More About Social Behavior Than The Environment

Study suggests birdsong patterns are driven more by social needs than acoustics.

Nonproducing Oil Wells May Be Emitting 7 Times More Methane Than We Thought

A study measured methane flow from more than 450 nonproducing wells across Canada, but thousands more remain unevaluated.