Lightlike simultaneity, comoving observers and distances in general relativity
نویسندگان
چکیده
منابع مشابه
Lightlike simultaneity, comoving observers and distances in general relativity
We state a condition for an observer to be comoving with another observer in general relativity, based on the concept of lightlike simultaneity. Taking into account this condition, we study relative velocities, Doppler effect and light aberration. We obtain that comoving observers observe the same light ray with the same frequency and direction, and so gravitational redshift effect is a particu...
متن کاملGeneralized observers and velocity measurements in General Relativity
To resolve some unphysical interpretations related to velocity measurements by static observers, we discuss the use of generalized observer sets, give a prescription for defining the speed of test particles relative to these observers, and show that, for any locally inertial frame, the speed of a freely falling material particle is always less than the speed of light at the Schwarzschild black ...
متن کاملSpecial Relativity With Apparent Simultaneity
An interpretation of special relativity is presented with alternative principles that treat an appearance of simultaneity as physically real. This implies instantaneous propagation of incoming light, but maintains light’s invariable propagation rate of c by using an alternative measure of speed. The relativistic Doppler effect is derived from physical principles based on the direct appearance o...
متن کاملTests of General Relativity at Large Distances and Dark Matter
The most simple observed cases of gravitational lensing of distant quasars and galaxies by galaxies and clusters of galaxies are used to test Einstein’s theory of General Relativity and Newtonian Gravity over galactic and intergalactic distances. They extend the distance range over which Newton-Einstein Gravity has been tested by 10 orders of magnitude. Although the precision of the tests are f...
متن کاملGeometric description of lightlike foliations by an observer in general relativity
We introduce new concepts and properties of lightlike distributions and foliations (of dimension and co-dimension 1) in a space-time manifold of dimension n, from a purely geometric point of view. Given an observer and a lightlike distribution Ω of dimension or co-dimension 1, its lightlike direction is broken down into two vector fields: a timelike vector field U representing the observer and ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geometry and Physics
سال: 2006
ISSN: 0393-0440
DOI: 10.1016/j.geomphys.2005.05.001