Determination of the velocity of a body moving uniformly Inertial and relative velocities

Volume 9, Issue 3, June 2024     |     PP. 99-110      |     PDF (1277 K)    |     Pub. Date: June 16, 2024
DOI: 10.54647/physics140628    23 Downloads     1219 Views  

Author(s)

Nasko Elektronov, Central Laboratory of Applied Physics at the Bulgarian Academy of Sciences, Sankt Peterburg, bul. 61, 4000, Plovdiv, Bulgaria

Abstract
In this paper, in the absence of forces we show how it is possible calculated the velocity of a moving uniform and rectilinear body without use external benchmarks. This is done using photodetectors that measure the arrival time of light from a point internal source to fixed equal distances inside the body.
We also show how the velocity of two arbitrarily chosen bodies with no forces acting on its and moving uniformly in a straight line can be found without the presence of other reference bodies. For this purpose, in addition to internal light signals, additionally, each of the bodies sends an external light signal to the other body and measures the arrival time of the reflected signal. The postulates in the special theory of relativity are used, that space is homogeneous, isotropic and that the speed of light in a vacuum is an invariant that does not depend on the speed of the radiation source.

Keywords
speed of light, speed of motion, inertial coordinate system, special relativity, STR, time, distance, light front, point light source, invariant, relative velocity, inertial velocity.

Cite this paper
Nasko Elektronov, Determination of the velocity of a body moving uniformly Inertial and relative velocities , SCIREA Journal of Physics. Volume 9, Issue 3, June 2024 | PP. 99-110. 10.54647/physics140628

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