Re: Логика за физици

On May 28, 10:47 am, Chorbalan <chorba...@xxxxxxx> wrote:
On Wed, 28 May 2008 02:16:27 -0700, ivanovad wrote:
On May 27, 9:29 pm, Chorbalan <chorba...@xxxxxxx> wrote:

На мене ми изглежда, че при срещата ще са си на еднаква възраст, но
не ми е много ясен ефекта на смана на посоката, в който момент става
коренцията. В wikipedia този момент не е обяснен, та затова питам...

Ne be, Chorbi, njama da sa na ednakva vqzrast pri sreshtata si. Ama- ha!

Проблема ми не е времето, а пътя: излиза че когато пътувам от София до
Бургаз, разстоянието между тях се скъсява с нарастването на скоростта
ми, а като стигна Бургаз и спра, изведнъж разстоянието пак 'пораства'
до нормалните си 396 километра ?

Chorbi, sega mislja che te razbiram, obache tochno tova stava po
Lorentz.
Eto oshte ot Stephen Hawking:

"Based on the Michaelson-Morley experiment, the Irish physicist George
FitzGerald and the Dutch physicist Hendrik Lorentz suggested that
bodies moving through the ether would CONTRACT and the clocks will
SLOW DOWN. This _contraction_ and the _slowing down_ of clocks would
be such that people would all measure the same speed of light, no
matter how they were moving with respect to the ether. (FitzGerald and
Lorentz still regarded ether as a real substance.)"

I tuk idva Einstein, da im kazhe - izostavete idejata za etera:

"However, in a paper written in June 1905, Einstein pointed out that
if one could not detect weather or not one was moving through space,
the notion of an ether was redundant."

i t.n., koeto sledva veche go prepisah v pqrvija si otgovor.

V obshtata teorija na otnositelnostta (General relativity) za da ima
smisql tazi kontraktzija na prostranstvoto (skqsjavaneto na tvoite
razstojanija) - 'gravity' e vkljuchena i irae pqlna rolja, kato na
Einstein intuitivno mu idva useshtaneto, che tova neshto e povlijano
ot gravitatzijata (ima pisma mezhdu nego i Mileva(pqrvata mu zhena,
sqshto fizichka) za roljata na gravitatzijata tochno pri tezi
transformatzii. Zashto gravitatzijata e vazhna tuk, Chorbi? zashtoto
ti vizhdash skqsjavaneto, kato si mislish, che geometrjata e ploska,
ne po krivi, a po pravi linii merish razstojanieto.
Sega shte tzitiram oshte malko, no predi tova da utochnja, che sled
kato postulatqt e, che 'Skorostta na svetlinata e sqshtata vqv
vsichki posoki i nezavisima ot dvizhenieto na telata (sistemite), to
imame prommenlivi: x, y, z, t, t.e. prostranstvo i vreme i sega v
sqvremennata teoretichna fizika sled Einstein te se razglezhdat kato
spacetime. Edno neshto. Eto oshte ot Hawking:

"If the Earth was flat, one could say that the apple fell on Newton's
head because of gravity or because Newton and the surface of the Earth
were accelerating upward. This equivalence between acceleration and
gravity didn't seem to work for a round Earth, however - people on the
opposite sides of the world (nie i G.Taran) would have to be
accelerating in opposite directions but staying at a constant distance
from each other.
But in 1912 Einstein had the brain wave of realizing that the
equivalence would work if the geometry of spacetime was curved and not
flat, as had been assumed before.
His idea was that mass and energy would warp spacetime in some manner
yet to be determined. Objects such as apples or planets would try to
move in straight lines through spacetime, but their paths would appear
to be bent by gravitational field, because spacetime is curved."

Eto kartinka:
http://www.astronomynotes.com/evolutn/grwarp.gif

Eto oshte po-hubava kartinka:
http://www.msen.com/~lwp/warp.doc

"With the help of his friend Marcel Grossmann, Einstein studied the
theory of curved spaces and surfaces that had been developed earlier
by Georg Friedrich Riemann (kakto vinagi matematikata se razviva
pqrva, predi da i se namerjat prilozhenijata - bel. moja). However
Riemann thought only of space which is curved. Einstein and Grossmann
wrote a joint paper in 1913 in which they put forward the idea that
what we think of as gravitational forces are just an expression of the
fact that spacetime is curved. However, because of a mistake in the
equations by Einstein (who was quite human and fallible), they weren't
able to find the equations that related the curvature of spacetime to
the mass and energy in it. Einstein continued to work on the problem
in Berlin, undisturbed by domestic matters and largely unaffected by
the war, until he finally found the right equations in November 1915.
He had discussed his ideas with the mathematician David Hilbert
(Hilbert mi e ljubimetz na men) during a visit to the University of
Gottingen in the summer of 1915, and Hilbert independently found the
same equations a few days before Einstein. Nevertheless, as Hilbert
himself admitted, the credit for the new theory belonged to Einstein.
It was his idea to relate gravity to the warping of spacetime. It is a
tribute to the civilized state of Germany at this period that such
scientific discussions and exchanges could go on undisturbed even in
wartime. It was a sharp contrast to the Nazi era twenty years later.

The new theory of curved spacetime was called general relativity to
distinguished it from the original theory without gravity, which was
now known as a special relativity. It was confirmed in a spectacular
fashion in 1919 when British expedition to West Africa observed a
slight bending of light from a star passing near the sun during an
eclipse.
Light from a star passing near the Sun is deflected by the way the
mass of the Sun curves spacetime. This produces a slight shift in the
apparent position of the star as seen from the Earth. This can be
observed during an eclipse.

Einstein's general theory of relativity transformed space and time
from a passive background in which events take place to active
participants in the dynamics of the universe..."

Posle idvat oshte problemi, vqvezhda se 'cosmological constant' i t.n.
do nashi dni.

Prochetete tazi k*** na Hawking, njama da sqzhaljavate!
.