Comment on "Frame-dragging: meaning, myths, and misconceptions" by L. F. O. Costa and J. Nat\'ario

TL;DR

This paper critiques the interpretation of the Sagnac effect and frame-dragging in a recent article, highlighting discrepancies with standard physics interpretations and questioning the original claims.

Contribution

It clarifies the difference between the authors' interpretation and the standard understanding of frame-dragging and the Sagnac effect, emphasizing the importance of correct theoretical application.

Findings

The authors' interpretation differs from Landau-Lifshitz standard

Questions the claim that Sagnac effect arises in fixed apparatuses

Highlights the importance of correct interpretation of frame-dragging

Abstract

I point out that the authors' interpretation of their calculations differs from the standard interpretation, described in Sect. 84 of Landau-Lifshitz book. This casts doubt on the authors' claim that Sagnac effect "arises also in apparatuses which are fixed relative to the distant stars (i.e., to asymptotically inertial frames); in this case one talks about frame-dragging".