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Prof Dadhich talks on Einstein, light and new theories

Prof Dadhich talks on Einstein, light and new theories

 

Giving insight into light acting as the vehicle for Universalisation and how light binds the universe were some of the issues highlighted at the public lecture given by Professor Naresh Dadhich, at the DUT Hotel School Conference Centre, DUT Ritson Campus on 9 September 2015.

Prof Dadhich said the search is on for a new theory after Einsten’s theory of special relativity, which determined that the laws of physics are the same for all non-accelerating observers, and showed that the speed of light within a vacuum is the same no matter the speed at which an observer travels.

“Mechanics should apply to everything that moves; it is universal. Similarly, gravity is also universal it should affect everything that physically exists. Light is also a physical entity like everything else and hence, it should be included in both mechanics and gravity. The former would lead to special relativity and quantum mechanics while the latter to Einstein’s theory of gravitation: general relativity. The lecture is built on common sense arguments with almost no mathematics,” he said.

Prof Dadhich spoke about how things occur as all things required energy for their creation and in particular there are two forms such as particles and waves.

“Particles can be at rest and can have arbitrary velocity and waves are never at rest and are always moving,” he said. He also touched on universal medium which is present everywhere. “Wave’s velocity can only change by changing or moving the medium and we seek such a medium that can neither be changed or moved,” he said.

Prof Dadhich also said that light binds space and time into space-time and universal light velocity becomes part of space time structure. “The next natural question is gravity must as well be universal and act on both massive as well as massless, but the problem is that a mass-less particle cannot change its velocity, it is constant for all,” he said.

So in essence, he reiterated that scientists must look at curving the path of a photon and the only way it could be done is by bending space (space-time) and letting particles (massive as well as massless) freely propagate in it. “On geodesics of curved space-time, the solution is that gravity can only be described by curvature of space-time,” he added.

So in essence, Prof Dadhich stressed the need for more scientists to put on their thinking caps and think of new theories, pertaining to Einsten’s theory of general relativity.

Prof Dadhich is a theoretical physicist, formerly at Inter-University Center for Astronomy and Astrophysics (IUCAA). He was also the director at the Inter-University Centre for Astronomy and Astrophysics (IUCAA) until August 31, 2009. He is now an Emeritus Professor at IUCAA. An Emeritus Professor is a professor who has retired but whose knowledge is still being vastly used because of their successes.

Prof Dadhich has published over 100 papers in international front rank journals collaborating with various students and colleagues. He has been nominated Honorary Research Professor by the University of Natal (now University of KwaZulu-Natal). He has been elected to the Council of the International Relativity Society and has been President for the Indian Relativity Society. His research interests are gravitation, black holes and energy extraction, gravity in higher dimensions and gravitation.

Pictured: Professor Naresh Dadhich talks about Universalisation as a physical guiding principle, at the public lecture.

Waheeda Peters

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