A derivation of relativistic aberration formulae and Lorentz transformations

Shankara, T. S.; Achuthan, P.

doi:10.1080/0020739810120312

Cited by 1 publication

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“…x 0 obs , which is an intuitive result−as seen in figure (14), the curvature of the curve at λ = 0 decreases as |x 0 obs | increases. At x 0 obs = 0, we get infinite curvature as the curve is not differentiable at λ = 0.…”

Section: Other Observationsmentioning

confidence: 56%

“…Figure (14) shows a series of snapshots of a line with → x = (0, 0, 10) with λ ∈ [-1,1] moving with a velocity of β = (0.45, −0.45, 0.9 √ 2 ) (speed = 0.9 in the north east direction) at times x 0 obs = −10, x 0 obs = −5, x 0 obs = 0, x 0 obs = 5, x 0 obs = 10, and x 0 obs =15. We can also find the apparent shape of fast-moving arbitrary functions.…”

Section: Apparent Shapes Of Other Objectsmentioning

confidence: 99%

“…To determine what observer S will see at another time x 0 obs using the same method, we must coincide the origin S with S at that moment of time and vary x accordingly. Note that, due to relativistic aberration (see [14]), S and S will not agree on the direction from which light originates. Since x 0 obs = 0, we can set a as 0.…”

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confidence: 99%

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Visual Appearance of Extended objects in Special Relativity

Bajaj

2021

Preprint

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The Lorentz transformation is a spontaneous measurement. We first highlight the difference between "measuring" and "seeing", where the latter considers the time light rays (emitted by each point on the object) take to reach the observer. We compute the apparent position of a point given its velocity, initial position, and observation time. The apparent speed of a point is calculated, and we obtain that it exceeds the speed of light when approaching the observer, similar to superluminal motion. For parameterizable surfaces, we analyze properties (such as curvature and torsion) of apparent shapes.The observation that a sphere retains its circular silhouette when transformed to its apparent shape, independent of the initial conditions, is proved mathematically. Plots describing the apparent speed and length of objects are made, and the metric tensor for a distorted sphere is calculated. A generalized equation for the Doppler effect and relativistic aberration is derived to analyze regions of redshift and blueshift. Using the Born-rigidity conditions, we compute the hyperbolic trajectories of each point on an extended object given an initial velocity, position, and proper acceleration for any reference point. The claim that a rigid body, accelerating in Special Relativity, cannot exceed a given length in certain circumstances is justified. We obtain many non-trivial results, which are proved algebraically and using light cones, that are tested by taking the limit of acceleration approaching 0 to retrieve results in the constant velocity scenario. In conclusion, these visualizations may be used by teachers to explain SR intuitively. Finally, we provide an overview of extending the same problem to curved spacetime and explain the potential applications of this project.

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Section: Other Observationsmentioning

confidence: 56%

Section: Apparent Shapes Of Other Objectsmentioning

confidence: 99%