16 citations · 72 across the 7 of their papers we have counts for
7 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…
Gyroscope precession in special and general relativity from basic principles
Rickard Jonsson
In special relativity a gyroscope that is suspended in a torque-free manner will precess as it is moved along a curved path relative to an inertial frame S. We explain this effect,…
An intuitive approach to inertial forces and the centrifugal force paradox in general relativity
Rickard Jonsson
As the velocity of a rocket in a circular orbit near a black hole increases, the outwardly directed rocket thrust must increase to keep the rocket in its orbit. This feature might…
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…