TL;DR
This paper calculates the closest approach distance for a non-relativistic probe during a free flyby of a Schwarzschild black hole, providing a simple model useful for teaching general relativity.
Contribution
It presents a straightforward calculation of the minimum approach distance in black hole flybys, tailored for educational purposes.
Findings
Minimum approach distance is r=4m for Schwarzschild black holes.
Applicable to non-relativistic probes at infinity.
Provides a pedagogical framework for teaching black hole encounters.
Abstract
We calculate the minimum distance at which one may approach a black hole in a free flyby. It corresponds to r=4m for the Schwarzschild black hole and a probe which was non-relativistic at infinity. The problem is formulated in a way that is useful for teaching introductory general relativity.
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