Experiment Makes Something Move at 104% of Speed of Light! The Darkness Inside

ELI5/TLDR

Light can be twisted into shapes that look like tiny whirlpools, and right at the center of each whirlpool there’s a pinprick of total darkness — a hole where the light waves perfectly cancel out. Scientists just managed to film these dark holes for the first time and caught them moving about 4% faster than light itself. Einstein is fine. The dark spot isn’t a thing — it’s a pattern, like the shadow of a lighthouse beam sweeping across the moon. Patterns are allowed to move faster than light because they aren’t really moving anything.

The Full Story

Why “faster than light” usually means “you broke physics”

The speed of light in a vacuum, roughly 300,000 km/s, is the universe’s hard ceiling. Anton lays out the two reasons we treat it as inviolable.

The first is the cost of getting there. Anything with mass — a spaceship, an electron, a coffee mug — gets heavier in momentum terms as it speeds up. Push it close to light speed and the energy required to keep accelerating goes to infinity. The fastest-known cosmic ray, the famously named OMG particle, only managed 99.99999% of light speed and physicists are still arguing about what could have launched it.

The second reason is the deeper one — causality. If you could send a signal faster than light, you could in principle send information into the past. Effects would arrive before their causes. The entire logical scaffolding of physics collapses. So the rule isn’t really “no fast objects.” It’s “no fast information.” Mass, energy, signals — none of them get to cross the line.

The hole inside the light

Now the trick. Imagine light not as a straight beam but as a wave that can twist around itself, like water spiraling down a drain. At the dead center of that twist, the wave crests and troughs cancel each other so perfectly that the intensity drops to zero. A tiny dot of pure darkness, sitting inside a region of light. Physicists call these optical phase singularities, or optical vortices. Think of them as the eye of a hurricane, except the hurricane is made of photons.

Two physicists, Michael Berry and John Nye, predicted these dots back in the 1970s. They also predicted something stranger — that under the right conditions the dark center could outrun the light wave it lives inside. Anton’s analogy is an eddy on a river that briefly skips ahead of the current carrying it. The math said it was possible. Nobody could see it happen because the events unfold on scales of femtoseconds — quadrillionths of a second — and over distances smaller than your eye can resolve.

“Until now this was mostly just a mathematical theory because these events usually happen on scales way too small and way too fast for any of us to see.”

How you film something that fast

The new experiment used a technique called ultrafast transmission electron microscopy. Instead of using light to take a picture, it fires pulses of electrons and uses them like the shutter of a stop-motion camera. Resolution: about three femtoseconds per frame. This is the camera that finally caught the vortex in the act.

There’s a second clever move. To slow the action down enough to study, the team used a material called hexagonal boron nitride. When light enters this material, it bonds with the vibrations of the atoms themselves and turns into a hybrid object — half photon, half mechanical wiggle. Physicists call these polaritons. The useful thing about polaritons is they crawl. They move about a hundred times slower than light in a vacuum. So the background “light” was already moving in slow motion, which made the dark vortices easier to track.

What they saw

When two of these dark vortices with opposite “spin” got close to each other, they annihilated — and in the moment of annihilation, they accelerated. The measured speed of the dark spot peaked at around 1.04 times the speed of light. About 4% faster than light, exactly as Berry and Nye had predicted fifty years earlier.

Why Einstein doesn’t care

This is the part that matters. The dark spot is not a particle. It has no mass. It is not made of photons or anything else. It is a geometric feature of the wave — a coordinate, basically, marking where the math says the intensity equals zero. As that pattern shifts across the medium, the location of “zero” shifts with it. Nothing actually travels from point A to point B.

Anton’s analogy is a laser pointer. If you stand on Earth and sweep a laser across the surface of the moon, the bright dot can move across the lunar surface faster than light. But no individual photon is doing that journey. New photons are arriving at each new spot. The dot is a pattern, not a thing. The dark vortex is the same idea, just inverted — a pattern of darkness instead of brightness.

Because the spot carries no mass, no energy, and crucially no information, it doesn’t violate relativity. The cosmic speed limit on actual stuff still holds.

So why does this matter

Three reasons.

First, the same kind of singularity — a dot of weirdness inside a wave — shows up in superconductors, superfluids, and the eyes of cyclones. Studying it cleanly in light gives physicists a model for how it behaves in messier systems, which might eventually feed into new electronics and materials.

Second, the microscopy technique itself is the bigger prize. Filming nanometer-scale events at femtosecond resolution opens up a window onto chemistry, biology, and atomic interactions that nobody has had before.

Third, optical vortices have practical uses even if they carry no information themselves. The light around them carries momentum, so the vortex can act as a tiny tractor beam, trapping and spinning microscopic particles without touching them. Astronomers have proposed using vortex coronagraphs to block out the glare of distant stars so they can directly photograph the planets next to them. And by encoding data into the topological “twist” of multiple vortex beams stacked on top of each other, you might pack much more information into the same fiber-optic channel.

The team’s next step is to repeat the experiment in three dimensions. So far they’ve only watched the vortices move on a flat surface.

Key Takeaways

The speed-of-light limit applies to mass, energy, and information — not to patterns. Shadows and wave features are allowed to move faster than light because nothing physical is being transported.
Optical vortices are points of zero light intensity formed by destructive interference at the center of a twisted wavefront. Predicted by Berry and Nye in the 1970s.
The 2026 experiment measured these dark spots moving at about 1.04 c during the moment two vortices of opposite charge annihilated each other.
The breakthrough was enabled by ultrafast transmission electron microscopy at three-femtosecond resolution combined with polaritons in hexagonal boron nitride, which slow background light by about 100x.
Polaritons are hybrid quasi-particles — light coupled to atomic vibrations. Used here as a way to “slow-motion” light so vortices become observable.
Singularities of this kind appear across very different physical systems: superconductors, superfluids, cyclones. Studying one cleanly informs the others.
Practical applications proposed: contactless trapping of microscopic particles, vortex coronagraphs to image exoplanets next to bright stars, high-bandwidth optical communication using topological charge as an extra encoding dimension.
The famous “laser pointer on the moon” thought experiment is the right intuition for why faster-than-light pattern motion doesn’t break causality.

Claude’s Take

Solid pop-physics video. Anton does what he usually does — picks a single result, explains the actual mechanism, and is honest that the headline (“faster than light!”) is a slight cheat. The 4% number is real, the experiment is real, the prediction it confirms is fifty years old, and nothing about Einstein is in trouble. He doesn’t oversell.

The genuinely interesting thing here isn’t the speed measurement. It’s the microscopy. Being able to film light-matter interactions at three femtoseconds is the kind of capability that quietly seeds a decade of follow-on discoveries in materials science, photochemistry, and quantum optics. The 104% headline is the click-bait wrapper around a real lab-technique milestone. Score lands at 7 — well-explained, accurate, and a useful peek at where applied optics is heading, but not life-changing.

One small irritation: the auto-transcript is mangled in a few places (“ftocond,” “polar tons,” “phentocs”). Anton’s own delivery is fine; the YouTube captions just garbled the technical terms. The actual concepts are all standard physics.