X-Received: by 2002:ac8:59d2:0:b0:343:57f:3049 with SMTP id f18-20020ac859d2000000b00343057f3049mr16852772qtf.55.1661211843988; Mon, 22 Aug 2022 16:44:03 -0700 (PDT) X-Received: by 2002:a05:6870:c596:b0:101:6409:ae62 with SMTP id ba22-20020a056870c59600b001016409ae62mr299915oab.112.1661211843695; Mon, 22 Aug 2022 16:44:03 -0700 (PDT) Path: ...!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail Newsgroups: fr.sci.astrophysique Date: Mon, 22 Aug 2022 16:44:03 -0700 (PDT) Injection-Info: google-groups.googlegroups.com; posting-host=93.27.150.145; posting-account=Lz-LbgoAAABPDavKeW-eYeobwLHD_cvQ NNTP-Posting-Host: 93.27.150.145 User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: Subject: Post-Truth (Einsteinian) Physics From: Pentcho Valev Injection-Date: Mon, 22 Aug 2022 23:44:03 +0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Bytes: 3362 Lines: 41 Kip Thorne: "If you move toward the [light] source, you see the wavelength = shortened but you don't see the speed changed" https://youtu.be/mvdlN4H4T54= ?t=3D296 Professor Martin White, UC Berkeley: "...the sound waves have a fixed wavel= ength (distance between two crests or two troughs) only if you're not movin= g relative to the source of the sound. If you are moving away from the sour= ce (or equivalently it is receding from you) then each crest will take a li= ttle longer to reach you, and so you'll perceive a longer wavelength. Simil= arly if you're approaching the source, then you'll be meeting each crest a = little earlier, and so you'll perceive a shorter wavelength. [...] The same= principle applies for light as well as for sound. In detail the amount of = shift depends a little differently on the speed, since we have to do the ca= lculation in the context of special relativity. But in general it's just th= e same: if you're approaching a light source you see shorter wavelengths (a= blue-shift), while if you're moving away you see longer wavelengths (a red= -shift)." http://w.astro.berkeley.edu/~mwhite/darkmatter/dopplershift.html The motion of the observer changes neither the wavelength of sound nor the = wavelength of light: "Thus, the moving observer sees a wave possessing the same wavelength [...]= but a different frequency [...] to that seen by the stationary observer." = http://farside.ph.utexas.edu/teaching/315/Waveshtml/node41.html "The wavelength is staying the same in this case." https://www.youtube.com/= watch?v=3DMHepfIIsKcE "Vo is the velocity of an observer moving towards the source. This velocity= is independent of the motion of the source. Hence, the velocity of waves r= elative to the observer is c + Vo. [...] The motion of an observer does not= alter the wavelength. The increase in frequency is a result of the observe= r encountering more wavelengths in a given time." http://a-levelphysicstuto= r.com/wav-doppler.php Accordingly, if the speed of the observer relative to the light source is V= o, the speed of the light relative to the observer is c'=3Dc+Vo, in violati= on of Einstein's relativity. See more here: https://twitter.com/pentcho_valev Pentcho Valev