Path: ...!npeer.as286.net!npeer-ng0.as286.net!fu-berlin.de!uni-berlin.de!news.dfncis.de!not-for-mail From: Luigi Fortunati Newsgroups: sci.physics.research Subject: Re: Experiments on the validity of Relativity Date: 2 Jun 2024 07:42:06 GMT Lines: 21 Approved: hees@itp.uni-frankfurt.de (sci.physics.research) Message-ID: References: X-Trace: news.dfncis.de byD45csyNTJo2J1XxL7DVgL/qytjiWWiOrhARCwGHbJtxS0SwPCPwD+MCd Cancel-Lock: sha1:EbWbEiElMdT2VhbK4b78wSsP9D8= sha256:uu0xF8SRJA4v/aiO3wl/50J9mM1zO7kCAVgy2kRswTM= Bytes: 1552 Il 24/05/2024 01:02, Mod. note -- > what's going on with accelerometer $#2: > (a) The "external forces" are really a gravitational field. In this > case accelerometer #2 is in free-fall, and having it read > "zero acceleration"... It's not zero acceleration, it seems zero to you because it's very small but it's not zero. This is what happens to accelerometer 1 in my animation https://www.geogebra.org/classic/vtvnm8uv where you don't notice the contraction and stretching of the springs just because the variations are too small to be visible. But just increase the force of gravity to realize that it doesn't show zero acceleration at all. Look what happens to accelerometer 2 which is also in free fall in a gravitational field: does it seem to show zero acceleration? Luigi Fortunati