#### Filter Results:

#### Publication Year

2002

2008

#### Publication Type

#### Co-author

#### Publication Venue

Learn More

Given, in an arbitrary spacetime (M, g), a 2-dimensional timelike subman-ifold Σ and an observer field n on Σ, we assign gravitational, centrifugal, Coriolis and Euler forces to every particle worldline λ in Σ with respect to n. We prove that centrifugal and Coriolis forces vanish, for all λ in Σ with respect to any n, if and only if Σ is a photon… (More)

In Schwarzschild spacetime the value r = 3m of the radius coordinate is characterized by three different properties: (a) there is a " light sphere " , (b) there is " centrifugal force reversal " , (c) it is the upper limiting radius for a non-transparent Schwarschild source to act as a gravitational lens that produces infinitely many images. In this paper… (More)

We discuss the geometry of timelike surfaces (two-dimensional submanifolds) in a Lorentzian manifold and its interpretation in terms of general relativity. A classification of such surfaces is presented which distinguishes four cases of special algebraic properties of the second fundamental form from the generic case. In the physical interpretation a… (More)

- ‹
- 1
- ›