During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String ...

Under the conditions of the Hamiltonian principle, information is exchanged between two masses during an interaction by ...

Researchers say they may have achieved Einstein's vision of a "unified field theory" that can unite two of nature's ...

“We proved that the Einstein field equation from general relativity is actually a relativistic quantum mechanical equation,” ...

Einstein formulated The Field Equations to mathematically describe the relation between curvature of spacetime and mass and energy. Einstein also introduced the concept of geodesics in his theory ...

It is called a black hole, because it acts like an ideal black body, as it reflects no light. According to the theory of ...

In the vast universe, galaxies rotate in ways that don’t make sense if only visible matter is considered. For almost a ...

The Einstein field equations are a system of second order, non-linear, coupled differential equations in 4 variables. As you can imagine, solving such a system is not easy. If the system possesses a ...

All of this is calculated with the equations that underpin general relativity: Einstein's field equations. "The way that the space-time curves is determined by the Einstein field equations ...

Special relativity and Lorentz transformations; Scalar and electromagnetic fields; Curved spacetime and the metric tensor; The equivalence principle; Geodesics, covariant derivatives, and Killing ...