Comments about "Relativistic Doppler effect" in Wikipedia

This document contains comments about the article Relativistic Doppler effect in Wikipedia
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Contents

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Introduction

The article starts with the following sentence.
The relativistic Doppler effect is different from the non-relativistic Doppler effect as the equations include the time dilation effect of special relativity and do not involve the medium of propagation as a reference point
The whole issue is to what extend a certain physical issue shows the Doppler effect or the relativistic Doppler effect.
Astronomers know of three sources of redshift/blueshift: #1 Doppler shifts; #2 gravitational redshifts (due to light exiting a gravitational field); and #3 cosmological expansion (where space itself stretches). This article concerns itself only with #1 Doppler shifts
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1. Derivation

1.1 Relativistic longitudinal Doppler effect

1.2 Transverse Doppler effect

1.2.1 Source and receiver are at their points of closest approach

1.2.2 Receiver sees the source as being at its closest point

1.2.3 Point of null frequency shift

1.2.4 One object in circular motion around the other

1.2.5 Source and receiver both in circular motion around a common center

1.3 Motion in an arbitrary direction

2 Visualization

3 Doppler effect on intensity

4 Experimental verification

4.1 Ives and Stilwell-type measurements

4.2 Direct measurement of transverse Doppler effect

4.3 Time dilation measurements

5. Relativistic Doppler effect for sound and light

6. See also

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Created: 24 January 2019

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