Expansion of Plane of Projection: Terrel & Penrose

In summary, the concept of the Terrel effect was presented in two papers by Terrel and Penrose. These papers state that the plane of projection is expanded by a factor equal to the Doppler factor in certain cases. This means that the area of the projected plane is also expanded by that factor. However, Terrel's paper, which used relativistic aberration, shows that each side of an infinitesimal rectangle is increased by that factor, leading to a squared expansion of the area of the projection plane. Links to the source papers, which are relatively simple to understand, have been provided for further discussion.
  • #1
Tahmeed
81
4
In two papers of Terrel and Penrose, the concept of Terrel effect were presented. Both of the papers say that "the plane of projection is expanded by a certain factor, which is equal to Doppler factor for certain cases." Now does it mean the area of the projected plane is expanded by that factor? But according to Terrel's paper, which used relativistic aberration to derive, each side of an infinitesimal rectangle is increased by that factor(the subtended angle of the sides increases therefore the sides). If that's the case, shouldn't the area of the projection plane be expanded by the square of that factor??
 
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  • #2
Can you provide any links to the source that we are able to discuss on a common base? This would help a lot to answer "does it mean" questions.
 
  • #3
Here are the links: https://dx.doi.org/10.1103/PhysRev.116.1041 (Terrel's paper)
https://dx.doi.org/10.1017%2FS0305004100033776(Penrose's)
Both are pretty simple and you just have to read first two-three pages to see what i meant. If you want i can upload screenshots.
 

Related to Expansion of Plane of Projection: Terrel & Penrose

What is the Terrel and Penrose expansion of plane of projection?

The Terrel and Penrose expansion of plane of projection is a mathematical concept that describes how an object appears to change in size and shape when viewed from different angles or perspectives. It is based on the theory of relativity and the idea that our perception of objects can be distorted by our relative motion.

What is the significance of the Terrel and Penrose expansion of plane of projection?

This concept is significant because it helps us understand how our perception of objects can change based on our relative motion. It has also been used in fields such as astrophysics to explain the appearance of distant objects.

Can the Terrel and Penrose expansion of plane of projection be observed in everyday life?

Yes, this phenomenon can be observed in everyday life. For example, when driving in a car, objects in the distance may appear smaller and closer together, while objects closer to the car may appear larger and more spread out.

How is the Terrel and Penrose expansion of plane of projection related to optical illusions?

The Terrel and Penrose expansion of plane of projection is related to optical illusions because it demonstrates how our perception of an object can be distorted by our relative motion. This can create optical illusions, where objects may appear to be different in size or shape than they actually are.

What are some potential applications of the Terrel and Penrose expansion of plane of projection?

Aside from its use in astrophysics and understanding perception, the Terrel and Penrose expansion of plane of projection also has potential applications in fields such as computer graphics, virtual reality, and visual effects in films. It can also aid in the design of optical instruments and improve our understanding of how light behaves.

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