Sector models - A toolkit for teaching general relativity: III. Spacetime geodesics
Ute Kraus, Corvin Zahn

TL;DR
This paper introduces a model-based approach using sector models to teach general relativity, focusing on geometric concepts with minimal mathematics, and provides practical activities for undergraduate students.
Contribution
It presents a simplified method for constructing spacetime geodesics on sector models, enhancing teaching tools for understanding general relativity.
Findings
Constructed light and particle paths on sector models.
Applied the method to radial paths near black holes.
Provided accessible teaching materials online.
Abstract
Sector models permit a model-based approach to the general theory of relativity. The approach has its focus on the geometric concepts and uses no more than elementary mathematics. This contribution shows how to construct the paths of light and free particles on a spacetime sector model. Radial paths close to a black hole are used by way of example. We outline two workshops on gravitational redshift and on vertical free fall, respectively, that we teach for undergraduate students. The contribution also describes a simplified calculation of the spacetime sector model that students can carry out on their own, if they are familiar with the Minkowski metric. The teaching materials presented in this paper are available online for teaching purposes at http://www.spacetimetravel.org . ----- Sektormodelle erm\"oglichen einen modellbasierten Zugang zur Allgemeinen Relativit\"atstheorie, der…
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