Is time travelling possible? Time travel used to be thought of as just science fiction, but Einstein’s general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.
Special Relativity | Lecture 18 | Maxwell Equations and Special Relativity #SpecialRelativity #MaxwellEquations In this video lecture Maxwell equations are discussed. How we can get electromagnetic wave equations from maxwell equations. The video starts with time dilation and the requirement of relativity to satisfy maxwell equations. we will write Maxwell Read more…
This course on Relativity (Special and General Theory) is basically meant for the amateurs and students who are interested in topics such as Black Holes, Cosmology or in the Classical Theory of Gravity. This course will take you from the basics required to understand the mathematical and physical formulations used Read more…
Rewritten and Edited by: Prashant Kumar Sinha ARIES | Aryabhatta Research Institute of Observational Sciences, Nainital: Astronomy and Astrophysics, and Atmospheric Physics. Bose Institute | Bose Institute, Kolkata: Atmospheric sciences, Biophysics, Complex systems and networks, Condensed matter physics and materials science, High energy physics and astroparticle physics, Quantum physics and quantum information, Read more…
There are four fundamental forces that exist in nature. They are Gravitational force, Electromagnetic force, Weak nuclear force and Strong nuclear force. Among these forces Strong nuclear force is strongest force and gravitational force is weakest force in nature. Gravitational force is responsible for the structure of universe, cluster, galaxies Read more…
Last dream of Einstein (Gauge Theory of Gravity) The last dream of Einstein was to unify the four fundamental forces. It has not been possible yet because scientists could not unify gravity with other forces. Other three forces follow rules of quantum mechanics except for gravity. Gravity is the only force Read more…
हमारा ब्रह्मांड रहस्यमय है यह आकार में बहुत बड़ा है और इसका विस्तार और प्रसार हो रहा है। सूर्य के बाद हमारा (पृथ्वी) निकटतम तारा प्रॉक्सिमा सेंचुरी (4.22 प्रकाश वर्ष दूर) है। इसका मतलब है कि अगर कोई भी सबसे तेज़ गति से चलने वाला अंतरिक्ष यान प्रॉक्सिमा सेंचुरी तक Read more…
Is black hole reality or a myth? Is black hole reality or a myth? According to the principle of physics, we can not see the Black Hole but we can observe them indirectly. Black Holes are massive celestial objects and due to the heavy mass, the gravitational pull of the Read more…
What is the big bang? According to the books, up to class 12th, it is well said that big bang was a big explosion which happened millions of year ago and in this big bang whole thing just change to dust, gases & free ions and molecules. And it is Read more…
A Black Hole of Gargantuan Proportion at the Centre of Galaxies A Black Hole of Gargantuan Proportion at the Centre of Galaxies from this distant vantage point, the galaxy looks like a calm, giant disc of rotating gas. But if you look closely at the picture, the central region looks Read more…