On Feb 22, 10:41*am, Pentcho Valev wrote:
It is absolutely obvious to the subtlest practitioners of doublethink
in Einsteiniana that, as the observer starts moving towards the light
source, the wavelength of the light heading towards him automatically
decreases so that the speed of the light (relative to him) can
gloriously remain constant, Divine Einstein, yes we all believe in
relativity relativity relativity:

http://www.pitt.edu/~jdnorton/teachi...s/big_bang/ind...
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)."

Yet naïve people (quite similar to the innocent child from "The
Emperor's New Clothes") often discover that the wavelength of the
light heading towards the observer simply cannot depend on his
movements and therefore it is the speed of light relative to the
observer, not the wavelength, that shifts as the observer starts
moving towards the source:

http://www.usna.edu/Users/physics/mu...plerEffect.pdf
Carl Mungan: "Consider the case where the observer moves toward the
source. In this case, the observer is rushing head-long into the
wavefronts, so that we expect v'v. In fact, the wave speed is simply
increased by the observer speed, as we can see by jumping into the
observer's frame of reference. Thus, v'=v+v_o=v(1+v_o/v). Finally, the
frequency must increase by exactly the same factor as the wave speed
increased, in order to ensure that L'=L - v'/f'=v/f. Putting
everything together, we thus have: OBSERVER MOVING TOWARD SOURCE:
L'=L; f'=f(1+v_o/v); v'=v+v_o."

http://a-levelphysicstutor.com/wav-doppler.php
"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 relative 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 observer encountering more wavelengths in
a given time."

http://www.expo-db.be/ExposPrecedent...ers%20son/Effe...
"La variation de la fréquence observée lorsqu'il y a mouvement relatif
entre la source et l'observateur est appelée effet Doppler. (...) 6.
Source immobile - Observateur en mouvement: La distance entre les
crêtes, la longueur d'onde lambda ne change pas. Mais la vitesse des
crêtes par rapport à l'observateur change !"

http://www.radartutorial.eu/11.coherent/co06.fr.html
"L'effet Doppler est le décalage de fréquence d'une onde acoustique ou
électromagnétique entre la mesure à l'émission et la mesure à la
réception lorsque la distance entre l'émetteur et le récepteur varie
au cours du temps. (...) Pour comprendre ce phénomène, il s'agit de
penser à une onde à une fréquence donnée qui est émise vers un
observateur en mouvement, ou vis-versa. La longueur d'onde du signal
est constante mais si l'observateur se rapproche de la source, il se
déplace vers les fronts d'ondes successifs et perçoit donc plus
d'ondes par seconde que s'il était resté stationnaire, donc une
augmentation de la fréquence. De la même manière, s'il s'éloigne de la
source, les fronts d'onde l'atteindront avec un retard qui dépend de
sa vitesse d'éloignement, donc une diminution de la fréquence."

http://www.flashcardmachine.com/waves6.html
"Moving Observer - frequency increases if the moving towards,
decreases if moving away. Wavelength does not change. The actual speed
of the wave does not change but to the observer the speed appears to
change."

http://www.phys.uconn.edu/~gibson/No...6_3/Sec6_3.htm
Professor George N. Gibson, University of Connecticut: "However, if
either the source or the observer is moving, things change. This is
called the Doppler effect. (...) To understand the moving observer,
imagine you are in a motorboat on the ocean. If you are not moving,
the boat will bob up and down with a certain frequency determined by
the ocean waves coming in. However, imagine that you are moving into
the waves fairly quickly. You will find that you bob up and down more
rapidly, because you hit the crests of the waves sooner than if you
were not moving. So, the frequency of the waves appears to be higher
to you than if you were not moving. Notice, THE WAVES THEMSELVES HAVE
NOT CHANGED, only your experience of them. Nevertheless, you would say
that the frequency has increased. Now imagine that you are returning
to shore, and so you are traveling in the same direction as the waves.
In this case, the waves may still overtake you, but AT A MUCH SLOWER
RATE - you will bob up and down more slowly. In fact, if you travel
with exactly the same speed as the waves, you will not bob up and down
at all. The same thing is true for sound waves, or ANY OTHER WAVES."

Pentcho Valev



Idiot