"Pentcho Valev" <
pva...@yahoo.com> wrote in message
news:68d9f6cb-a09c-45f1...@googlegroups.com
> A stationary source sends a light pulse towards a stationary
> observer/receiver. Then the source starts moving towards the observer
> and sends another pulse. The two pulses are physically different,
> judging from the different frequency they will have at reception, and
> the difference is obviously created BEFORE reception. What does the
> difference consist in? Two answers are conceivable:
>
> (A) The speed of the second pulse (relative to the observer) is
> higher than the speed of the first. Needless to say, this is fatal
> for relativity.
It is measured to have the *same* speed.
Ignorance of this, all by itself, is fatal for Pentcho.
>
> (B) The wavelength of the second pulse is shorter than the wavelength
> of the first. This is also fatal for relativity but for a different
> reason. If the wavelength of light varies with the speed of the
> source (as is the case with sound waves), then the principle of
> relativity is violated - the motion of the light source towards the
> observer is not equivalent to the motion of the observer towards the
> source. As the source changes its speed, various wavelengths travel
> between source and receiver. This does not happen when the receiver
> changes its speed.
According to relativity is has the *same* effect.
Ignorance of this, all by itself, is fatal for Pentcho.
QUIZ: Ignorance of which differences listed below is *not* fatal
Pentcho?
- reading text vs. copying it to Usenet posts,
- light vs. sound,
- ideal circumstances vs. realistic circumstances,
- crackpots vs. people writing books fancied by crackpots,
- rates vs. values,
- a personal humorous musing vs. a common dogma,
- children's books vs. inspired essays,
- physicists vs. philosophers,
- coordinate time vs. proper time,
- invariance vs. constancy,
- special relativity vs. general relativity,
- teachers vs. hypnotists,
- laymen vs. zombies,
- a person being right vs. a theory being right,
- students vs. imbeciles,
- bad science vs. bad engineering,
- bad engineering vs. bad cost management,
- honing the foundations of a theory vs. fighting it,
- physics vs. linguistics,
- an article written in 1905 vs. a theory created in 1915,
- understanding a book vs. turning its pages,
- speed vs. relative (aka closing) speed,
- doing algebra vs. randomly writing down symbols,
- real life vs. a Usenet hobby group,
- receiving a detailed reply vs. being ignored,
- everyday concepts vs. scientific concepts in physics,
- the three things that smell like fish,
- inertial vs. non-inertial,
- speed vs. velocity,
- an article vs. a book,
- relativity vs. disguised ether addiction,
- algebra vs. analytic geometry,
- kneeling down vs. bending over,
- local vs. global,
- a sycophant in English vs. in French,
- a relation vs. an equation,
- massive vs. massless particles,
- a Mexican poncho vs. a Sears poncho,
- implication vs. equivalence,
- group velocity vs. phase velocity,
- science vs. religion
Dirk Vdm