Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Einstein’s relativity theory proven with the ‘lead’ of a pencil

10.11.2005


Scientists at The University of Manchester have discovered a new way to test Einstein’s theory of relativity using the ‘lead’ of a pencil.



Until now it was only possible to test the theory by building expensive machinery or by studying stars in distant galaxies, but a team of British, Russian and Dutch scientists has now proven it can be done in the lab using an ultra-thin material called Graphene.

The group, led by Professor Andre Geim of the School of Physics and Astronomy, discovered the one atom thick material last year. Graphene is created by extracting one atom thick slivers of graphite via a process similar to that of tracing with a pencil.


Professor Geim, said: “To understand implications of the relativity theory, researchers often have to go considerable lengths, but our work shows that it is possible to set up direct experiments to test relativistic ideas. In theory, this will speed up possible discoveries and probably save billions of pounds now that tests can be set up using Graphene and relatively inexpensive laboratory equipment.”

In a paper published in Nature (November 10, 2005), the team describes how electric charges in Graphene appear to behave like relativistic particles with no mass (zero rest mass). The new particles are called massless Dirac fermions and are described by Einstein’s relativity theory (so-called the Dirac equation).

The team also reports several new relativistic effects. They have shown that massless Dirac fermions are pulled by magnetic fields in such a manner that they gain a dynamic (motion) mass described by the famous Einstein’s equation E=mc2. This is similar to the case of photons (particles of light) that also have no mass but can still feel the gravitational pull of the Sun due their dynamic mass described by the same equation.

Dr Kostya Novoselov, a key investigator in this research, added: "The integer and fractional quantum Hall effects are two of the most remarkable discoveries of the late 20th century. It is not easy to explain their significance but both discoveries led to Nobel prizes. One can probably appreciate the importance of our present work in terms of fundamental physics, if I mention that one of the phenomena we report is a new, relativistic type of the quantum Hall effect.”

Simon Hunter | alfa
Further information:
http://www.manchester.ac.uk/news

More articles from Physics and Astronomy:

nachricht New NASA study improves search for habitable worlds
20.10.2017 | NASA/Goddard Space Flight Center

nachricht Physics boosts artificial intelligence methods
19.10.2017 | California Institute of Technology

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>