pentcho valev

Generally, relativists are excellent teachers:

http://www.physlink.com/Education/AskExperts/ae13.cfm :
"So, it is absolutely true that the speed of light is _not_ constant
in a gravitational field [which, by the equivalence principle, applies
as well to accelerating (non-inertial) frames of reference]. If this
were not so, there would be no bending of light by the gravitational
field of stars. One can do a simple Huyghens reconstruction of a wave
front, taking into account the different speed of advance of the
wavefront at different distances from the star (variation of speed of
light), to derive the deflection of the light by the star.
Indeed, this is exactly how Einstein did the calculation in:
"On the Influence of Gravitation on the Propagation of Light," Annalen
der Physik, 35, 1911.
which predated the full formal development of general relativity by
about four years. This paper is widely available in English. You can
find a copy beginning on page 99 of the Dover book "The Principle of
Relativity." You will find in section 3 of that paper, Einstein's
derivation of the (variable) speed of light in a gravitational
potential, eqn (3). The result is,
c' = c0 ( 1 + V / c^2 )
where V is the gravitational potential relative to the point where the
speed of light c0 is measured."

However, if teachers want their students to understand the real
grandeur of Einstein's discoveries, they should set more problems. For
instance: A light source on the surface of a huge celestial body,
where the gravitational field is enormous, sends light towards a very
distant INERTIAL observer (where the field is zero). What speed of
light will the observer measure?

Students will learn that, according to Einstein, the speed of light
for inertial observers is not only constant but also variable. So
students will understand both the grandeur and the essence of
Einstein's discoveries.

Pentcho Valev

dirk van de moortel

Well, Pentcho Valev, that light, when moving from one place
to another in that lab, will be measured to have speed c
between those two places. That's what locality means in
English. Was'n this explained to you before?


Not only locally constant, but also globally variable.
Was'n this explained to you before?


Yes, most students will understand the difference between
locality and globality. And if they don't understand, it will
be explained. And then most of them will understand.

Dirk Vdm

pentcho valev

As always, you do not read carefully what your masters say Moortel and
so you are going to become harmful rather than useful for the
relativity cult. Read again Master Tom Roberts' statement about EACH
AND EVERY INERTIAL FRAME:

http://groups.google.com/group/sci.physics.relativity/browse_frm/thread/d0a4b4e39f526f53/e1e629fdf67094a2#e1e629fdf67094a2

Pentcho Valev

dirk van de moortel

.... in whch the speed is LOCALLY measured
L O C A L L Y M E A S U R E D.
Congratulations!

Dirk Vdm

pentcho valev

Bravo Moortel!

Pentcho Valev

dirk van de moortel

Ah, perhaps I forgot to mention:

_ ____ _____ _ _ __ __
| | / __ \ / ____| /\ | | | | \ \ / /
| | | | | | | / \ | | | | \ \_/ /
| | | | | | | / /\ \ | | | | \ /
| |___| |__| | |____ / ____ \| |____| |____| |
|______\____/ \_____/_/ \_\______|______|_|

__ __ ______ _____ _ _ _____ ______ _____
| \/ | ____| /\ / ____| | | | __ \| ____| __ \
| \ / | |__ / \ | (___ | | | | |__) | |__ | | | |
| |\/| | __| / /\ \ \___ \| | | | _ /| __| | | | |
| | | | |____ / ____ \ ____) | |__| | | \ \| |____| |__| |
|_| |_|______/_/ \_\_____/ \____/|_| \_\______|_____/

Of course, not all students will understand it. I guess we'll
have to learn to live with that.

Dirk Vdm

harry

I wonder if you REALLY don't get it or if you're trolling. Let me spell it
out for you:

1. If one determines the average speed of light inside an inertial lab in
space that uses its own reference system, then one will find that that speed
V=c.
2. If one determines the average speed of light between the star and the lab
then one will find that V<c, thus confirming that V<c near the star.

Is that so hard to grasp?

Harald

What a ****ing moron the average speed of light. is c+v in on
direction and c-v in the other.

Your ****ing delusion about vector dependent time in the lab is just
that a delusion.
I know you think that somehow you "infamous inertial frame" somehow
will transform the light to move invariant within the frame, but it
will not only the Lorentz transform will do that and it is not
applicable. It is vector dependent cucko transforms. Moron.

ufo

fine

when you ever can measure anything non-locally let me know

dirk van de moortel

http://www.windows.ucar.edu/tour/link=/kids_space/star_dist.html

Dirk Vdm