A most interesting audience gathered yesterday at the third and now traditional Café Scientifique at the Dark and Light Beer House, organized by the International Science and Technology Centre (ISTC), the InformNauka agency and the Uspekhi Fiziki (Successes of Physics) Foundation, headed by Academician V.L. Ginzburg. Not only science journalists from the most varied publications and astrophysicists, but science-fiction writers, too came to the café. A make up of such an unusual order dictated the far from usual theme for the café: ‘Travel through space and time – a dream or reality?’ It arose because this year, 2005, is World Physics Year, celebrating the 100th anniversary of Einstein’s theory of relativity. In this way the Café Scientifique has made its own modest contribution to the celebration of World Physics Year, which is underway all over the world.
Questions of time and space have occupied the minds of humans for many decades. It was interesting to hear the point of view on this problem both of specialists in astrophysics, quantum mechanics and cosmology, and science-fiction writers who are inspired by science to create works of literature.
Space and time. We are more or less clear on the first, but is it possible to give a precise definition of time? This question was put to the house by co-host of the Café, Liubov Strelnikova. It should be said that the question stumped those present, as no one actually put forward a precise definition. Those present believe that time relates to a number of undefined concepts. Anatoly Mikhailovich Cherepaschuk, Corresponding Member of RAS, Director of the Sternberg State Astronomical Institute defined time as a concept that arose together with matter at the moment when the Universe was born. Alexander Viktorovich Berkov from the Chair of Theoretical Atomic Physics of MEPhI reminded the audience that time is the fourth coordinate and that we live in a four-dimensional world. The humanitarian Alexei Ananchenko from the Ministry of Education and Science believes that time is an abstraction that characterizes the change in an object. And the writer Vadim Kirpichev believes categorically that space and time are nothing but attributes of our thought processes. Finally, many shared the viewpoint that it is impossible to give a precise definition of time; all the processes that are linked with it are too complex, including those in biological objects. So there is no definition but time exists and nothing stops us from discussing and writing about it.
Sergey Komarov | alfa
Physicists Design Ultrafocused Pulses
27.07.2017 | Universität Innsbruck
CCNY physicists master unexplored electron property
26.07.2017 | City College of New York
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Life Sciences
27.07.2017 | Life Sciences
27.07.2017 | Health and Medicine