Yes it’s true and it was discovered by a group of scientists in Washington University. These group of people were able to film light waves creating their own version of sonic boom (when an object moves faster than speed of sound).

This means that the light needs to travel faster than the waves it emits to reveal the elusive photonic Mach cone.

Although we were taught that nothing is faster than light in a vacuum 300,000km per second) but due to some advanced equipments it has been proved wrong.

Jinyang Liang and her colleagues used a unique studio set-up, they used a super ultra-speed camera (a trillion frames per second) with a purpose-built light-slowing device.

In order to slow the light down, the team built a channel with two plates of silicone rubber, and filled the gap in between with a dry-ice fog. They were then able to fire pulses of green laser light – each lasting only 7 picoseconds (trillionths of seconds) down the tunnel.

And given that the light passes more slowly through the walls of the tunnel than through the fog, the photonic Mach cone emerged from the fog.


The researchers have said that this discovery, is not only pretty cool, but actually has potential impacts for the biomedicine industry and new medical equipment.



http://nebustar./science/light-moving-faster-than-light-itself/