rt .co m http://rt.com/news/159944-physics-light-turn-matter/

Scientists find way to turn light into matter

Published time: May 19, 2014 16:06

AFP Photo / Ingo Wagner

Researchers in London have f ound a way to make matter f rom light, using high powered lasers. The ideabehind the theory was f irst thought up 80 years ago by two physicists, who were to work later on creatingthe world’s f irst atomic bomb.

In 1934, US physicists Gregory Breit and John Wheeler worked out that, on very rare occasions, twoparticles of light (photons) could combine to produce an electron and a positron. They were never able tocarry out their theory in practice as they believed it would be almost impossible.

However, Steve Rose, who is prof essor of physics at Imperial College London, says, “today, nearly 80 yearslater, we proved them wrong.” Rose went on to add, "despite all physicists accepting the theory to be true,when Breit and Wheeler first proposed the theory, they said that they never expected it be shown in thelaboratory.”

“What was so surprising to us was the discovery of how we can create matter directly from light using thetechnology that we have today in the UK. As we are theorists we are now talking to others who can use ourideas to undertake this landmark experiment,” Rose continued.

They have managed to create a machine called a photon-photon collider, which would turn light into matter.However, the type of matter they are looking to create will be invisible to the naked eye.

Oliver Pike, the lead researcher of the study, said that the experiment would be the most elegantdemonstration of Einstein's f amous f ormula. "The Breit-Wheeler process is the simplest way matter can bemade from light and one of the purest demonstrations of E=mc2," he told The Guardian.

The process works something like this. Firstly, the scientists would use an extremely powerf ul laser to

speed up the electrons to travel almost at the speed of light. These electrons would then be f ired at a slabof gold. This would create a beam of photons, which are a billion times more powerf ul than visible light.

The next stage sees a high energy laser being f ired into a hohlraum, which is the German f or an ‘emptyroom.’ As a consequence, light as bright as that emitted by stars is produced and in the f inal stage, the f irstbeam of the photons is directed towards the hohlraum, where the two streams collide, which f ormselectrons and positrons.

The study has been published in the journal Nature Photonics.

The scientists hope that the process will be demonstrated over the next 12 months, and if it is successf ul,it will encourage physicists to study how subatomic particles behave. Pike stated, "such a collider could beused to study fundamental physics with a very clean experimental setup: pure light goes in, matter comes out.The experiment would be the first demonstration of this.”

The experiment would recreate a process that was important in the f irst 100 seconds of the universe andthat is also seen in gamma ray bursts - the biggest explosions in the universe and one of the greatestunsolved mysteries of physics.

© Autonomous Nonprof it Organization “TV-Novosti”, 2005–2014. All rights reserved.