Natural Science Forum / Physics / Relativity / July 2006

I know the Earth has the same orbit and angle with the Sun each year
but...
...Does the Earth return to the exact location in space it was the
previous year, if not by how much does it's orbit deviate in terms of

I'm looking for sources to download his publications.Any help
Thanks

Hi I have a few thought experiments I like to see how other peoples
opinions are on the results,
Experiment 1:
A space ship travelling at close to the speed of light shoots a

Does Relativity say that all motion is relative? I mean for instance,
isn't there some scientific way of determining whether the earth is
really going around the sun instead of the sun going around a
stationary earth?

I did a quick survey.
On average, Paul Draper, PhD (basket weaving), oka PD, sends about 3000
messages per day to this NG. Most are quite long and involve a fair amount of
reading as well as writing. Presumably he subscribes to other groups as well.

1. Consider an Observer A standing at the centre between two mirrors.
Observer A. sends out two lightsignals
i.e. one towards each mirror.
Each signal will be reflected by its corresponding mirror.

Human hands glow, but fingernails release the most light, according to
a recent study that found all parts of the hand emit detectable levels
of light.

OWLS Anisotropy Update (2).
\-I recently set about testing a theory (which was provided courtesy
\-of the zero origin concept of course) that, because the mechanism
\-involved in reflecting a beam from within a matter environment is

What amplitude does an electromagnetic wave have?  We know the wavelength
relates to how much energy the photon has, but what does the amplitude of
the photon indicate? Is the amplitude the same for all electromegnetic
waves?

Here are three fairly challenging but not impossible problems to try.
I think exercise 3 is the easiest, as there are no numerical
calculations to perform, though I expect some disagreement as to the
answer to 3a.

Those familiar with the left/right hand rules for electrons traveling
in wires in order to establish each electron's SPIN and each electron's
MAGNETIC field polarity direction:
Do two electrons traveling in two unshielded "parallel" wires in "close

This might be of some interest:
"A Tale of Two Clocks: A Thought Experiment in Relativity"
I. Introduction
Since this is just a thought experiment, we need the following:

Thanks so much to everyone who replied to:
http://groups.google.ca/group/sci.physics.relativity/browse_thread/thread/5ad2a9
870f26641f?hl=en
the above thread.  I'm sorry I didn't actively participate, but google
didn't notify me there were so many posts.

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Note to Egyptologists:
 This post by a physicist proposes that the
"animal-headed Egyptian gods" were in reality

Definition of the BaT: "Light initially moves at c wrt its source".
If a remote light source emits a pulse of light towards a target observer
moving relatively at v1, then, from the point of view of a third observer O3,
the 'closing speed' of that pulse towards the first observer is ...