The relativistic Doppler effect: when a zero-frequency shift or a red shift exists for sources approaching the observer
✍ Scribed by C. Wang
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 277 KB
- Volume
- 523
- Category
- Article
- ISSN
- 0003-3804
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
It is shown without making use of Lorentz transformation that there exists a phenomenon of relativistic zero‐frequency shift in Doppler effect for a plane wave in free space, observed in two inertial frames of relative motion, and the zero shift takes place at a maximum aberration of light. When it is applied to analysis of a moving point light source, two unconventional physical implications result: (1) a light source, when it is approaching (moving closer to) the observer, may cause a red shift; (2) a zero‐frequency‐shift observation does not necessarily mean that the light source is not moving closer, and in contrast, the light source may be moving closer to the observer at a high speed. This fundamental result of special relativity may provide an alternative way to experimentally examine the principle of relativity, and might have a significant application in astrophysics.