Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math

Topic: THE ACHILLES HEEL OF SPECIAL RELATIVITY
Replies: 5   Last Post: Apr 23, 2013 4:49 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Pentcho Valev

Posts: 3,527
Registered: 12/13/04
Re: THE ACHILLES HEEL OF SPECIAL RELATIVITY
Posted: Apr 20, 2013 5:22 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

http://www.youtube.com/watch?v=3mp3CZAS8lw

SOUND WAVES:

1. Both source and observer at rest:

speed of waves relative to the observer: c

frequency the observer measures: f=c/L

wavelength passing the observer: L

2. Observer moving towards the source with speed v:

speed of waves relative to the observer: c'=c+v

frequency the observer measures: f'=(c+v)/L

wavelength passing the observer: L'=L

LIGHT WAVES:

1. Both source and observer at rest:

speed of waves relative to the observer: c

frequency the observer measures: f=c/L

wavelength passing the observer: L

2. Observer moving towards the source with speed v:

speed of waves relative to the observer: c'=???

frequency the observer measures: f'=(c+v)/L

wavelength passing the observer: L'=???

Clever Einsteinians know that the correct answers are c'=c+v and L'=L, which is fatal for special relativity of course. They also know that the alternative that saves special relativity, c'=c and L'=cL/(c+v), is so obviously silly that it could be a danger even in Divine Albert's totalitarian world. So the absurd variation of the wavelength with the speed of the observer, L'=cL/(c+v), is usually not discussed in Einsteiniana but still exceptions can be found:

http://www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/big_bang_observed/index.html
John Norton: "Here's a light wave and an observer. If the observer were to hurry towards the source of the light, the observer would now pass wavecrests more frequently than the resting observer. That would mean that moving observer would find the frequency of the light to have increased (AND CORRESPONDINGLY FOR THE WAVELENGTH - THE DISTANCE BETWEEN CRESTS - TO HAVE DECREASED)."

http://lewebpedagogique.com/physique/files/p8044_37aa292833de8bd2b5c4583ffb76cf69p866_a910dac1b2c66fe5536711394c0cd778doppler_p.gif

Pentcho Valev



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.