On Thu, 03 Nov 2005 02:01:21 GMT, "Androcles" Androcles@ MyPlace.org
wrote:



What are you doing agreeing with me, Duck? You've always been a simple-minded troll that had no idea how relativity was derived and assumed I didn't either. I've been explaining it for years, even written "See Spot Run" stories for the simple-minded like you.
See if you can find REAL fault with this without snipping, much of it is paraphrased from Einstein's paper; you'll need an attention span of more than 2 minutes, though:

Sam, Joe, a mosquito and a ladder.
by Androcles


Much of this story is credited to Daryl McCullough, only the ladder
and the story was added by me. It explains the origins of Einstein's
Special Relativity scaled for those having difficulty grasping the
subject.


Scale 1 ft : 60,000 km



Sam and Joe are housepainters, and are walking along the street at 3 fps
in still air carrying a 32 ft long ladder between them, Joe leading the
way. Sam is carrying some paint cans and Joe has the brushes and
rollers.


At some point along their journey a mosquito named Albert buzzes past
Sam's ear. Sam swats at it, but drops a can of red paint as he does so.


Albert the mosquito flies along the ladder from Sam to Joe at a constant
speed of 5 fps. When it reaches Joe, Joe also swats at it, but drops a
paint roller. Albert, still hungry but not liking the smell of Joe's cigar,
flies back along the ladder toward Sam, again with a constant speed of
5 fps in the still air. Upon reaching Sam, once again Sam tries to swat
the wee beastie but drops a can of green paint. He yells as the mosquito
bites him and this startles Joe, who drops a paint brush.

Now it's your turn. I'll give the answers further down, but take a
moment to do the calculations for yourself.

1) How many seconds did it take for Albert to fly from Sam to Joe?
2) How many seconds did it take for Albert to fly from Joe to Sam?
3) How far is it between the red paint can and the roller?
4) How far is it between the green paint can and the roller?


Here are all the popular misconceptions combined in one.

Two painters move together with the ladder.

1.)
"Fixed distance" between Joe and Sam is an assumption.
How do we measure distance? with meter sticks.
How do we know they remain at constant length?

2.)
They move with constant speed, 3 fps in the example.
Speed in respect to what?
There is no absolute speed, only relative speed is known.
So our two painters actually move in an EARTH coordinate system.

3.) The Mosquito flies between Sam and Joe, which live in a
moving coordinate system with respect to Ground.
(Otherwise, use the ladder as reference, then Earth moves by).

4.)
Sam and Joe drop markers from their moving coordinate system
to the Earth at rest, which is equivalent to a coordinate
transformation.
When you do the transformation calculations properly,
length dilatation will result.
This is all RT is about, and the above example is a classroom
exercise for beginner levels after about 10 lesson hours of RT.





(Answers below)

All wrong.

.........



For myself, I'll keep the collection of prejudices I acquired by the
time I was eighteen, since that defines common sense.

Androcles.


Why did you stop learning at 18?

w.
--
On the Internet nobody knows that I am a dog.

On Thu, 03 Nov 2005 09:47:25 +0100, Helmut Wabnig EmailAddress@
wrote:

length dilatation will result.


contraction,
hell&devil


w.