13 citations · 34 across the 4 of their papers we have counts for
4 papers
Optical geometry across the horizon
Rickard Jonsson
In a companion paper (Jonsson and Westman, Class. Quantum Grav. 23 (2006) 61), a generalization of optical geometry, assuming a non-shearing reference congruence, is discussed. Her…
Inertial forces and the foundations of optical geometry
Rickard Jonsson
Assuming a general timelike congruence of worldlines as a reference frame, we derive a covariant general formalism of inertial forces in General Relativity. Inspired by the works o…
Visualizing curved spacetime
Rickard Jonsson
I present a way to visualize the concept of curved spacetime. The result is a curved surface with local coordinate systems (Minkowski Systems) living on it, giving the local direct…
Embedding spacetime via a geodesically equivalent metric of Euclidean signature
Rickard Jonsson
Starting from the equations of motion in a 1 + 1 static, diagonal, Lorentzian spacetime, such as the Schwarzschild radial line element, I find another metric, but with Euclidean si…