## You were right: Rotational motion is relative, too, Mr. Einstein!

AAF
AAF

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

Hey Ufonaut99:

For how many bucks are they willing to sell
Pravda, now?

...............................................................................................

""AAF: if the observer does not adjust periodically the direction of the camera to keep pointing to S_1, then the camera will go with S_2 and will point towards S_1 just once per rotation. ... Is "S_1 obviously ALWAYS positioned in FRONT of the camera"? Not a chance! ... IF Szczepan is sitting motionless on that non-rotating S_1, then we will see him rotating around the camera." All claims that are directly contradicted by the video. Look at it AGAIN:
http://www.shutterstock.com/video/clip- ... ching.html "

Nothing in the above 'super-duper' video contradicts those
two 'fabulously' accurate statements of mine:

A. IF the observer does not adjust periodically
the direction of the camera to keep pointing to S_1, THEN the camera will
go with S_2 and will point towards S_1 just once per rotation.

B. IF Szczepan is sitting motionless on that
non-rotating S_1, THEN we will see him rotating around the camera.

Anonymous
Anonymous

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

enough

Anonym
Anonym

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

AAF
AAF

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

Hi, Anonym:

Enough?

I guess NOT!

The topic of rotation is very complicated.

And according to QUORA,
<b>"This Is The Hardest Concept To Grasp In Physics"
:

http://www.forbes.com/sites/quora/2016/ ... a2833493c6

….......................................................................................................................................................................

"Note that: the observer does NOT adjust periodically the direction of the camera Does the camera point towards that S_1 silver disk
just once per rotation? OF COURSE NOT as everyone can see with their own eyes!"

How do you know that "the observer does NOT adjust periodically
the direction of the camera"
</b>?

This cameraman must have adjusted his camera correctly; otherwise,
very messy trails would have been visible:

http://www.tabletopstudio.com/documents ... graphy.htm

Right?

AAF
AAF

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

"* Is that S_1 silver disk ALWAYS positioned in FRONT of the camera? YES as everyone can see with their own eyes!"

Where is the camera?

The camera is on Terra firma outside the rotating disk;
right?

But, as you know, Alice's camera is on the rotating Einstein's S_2 itself.

And so, these two situations are quite different from each other:

In the case of the video, the camera is outside the disk and having it in view
within a half circle and no more.

By contrast, Alice's camera is on Einstein's S_2 and having Einstein's S_1 within
a complete circle above it.

And that is a BIG difference indeed!

AAF
AAF

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

"* Do we see that S_1 silver disk (or imagining Szczepan sitting on it) "rotating around the camera"? OF COURSE NOT;
S_1 disk (and therefore Szczepan) is clearly ALWAYS positioned in FRONT of the camera."

In the case of Szczepan, the camera is with Alice on the periphery
of the rotating merry go round; am I right?

So, there is absolutely no chance for this rotating camera to keep track of him;
unless Alice decides to adjust her camera correctly and as required in situations
of this sort.

And we should always remember that a picture of Szczepan's front side
is NOT the same as a picture of Szczepan's back side!

AAF
AAF

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

""AAF: Einstein, in his 1916 paper, asserted that reflection symmetry would make Object S_1 appear to rotate around its geometrical axis due to the axial rotation of Object S_2." And in the video, does that S_1 silver disk "appear to rotate around its geometrical axis due to the axial rotation of Object S_2"? YES, OF COURSE IT DOES as everyone can see with their own eyes!"

Are you saying that Einstein's 1916 assertion
is blatantly false?

I like it!

However, In the aforementioned video, the camera is on
Terra firma.

While, in the case of Einstein's S_1, the camera is on
the rotating Einstein's S_2.

And so, these two situations are not the same.

In any case, no object can be made to appear rotating around its geometrical
axis due to the axial rotation of another object, regardless of Einstein's
assertion to the contrary.

AAF
AAF

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

"All your claims are just plain WRONG. Seriously, how much
more evidence do you need than this ACTUAL VIDEO FOOTAGE of them
all being WRONG??"

As far as Einstein's S_1 & S_2 are concerned, my arguments
have been, so far, quite strong.

And even the ACTUAL VIDEO FOOTAGE
above can show it!

Let me try to restate them very briefly:

I. The circular motion of observers,
on Einstein's S_2, causes Einstein's S_1 to appear, to them, to be moving,
above in the sky, in a circle whose angular area is directly proportional
to the angular area of their geographical latitude and inversely proportional
to the actual distance between Einstein's S_2 & Einstein's S_1. And that
is technically called 'the effect of parallax'.

II. The tangential velocity of observers,
on Einstein's S_2, causes Einstein's S_1 to appear,
to them, to be moving, in the sky above, in a circle
whose angular area is directly proportional to the
numerical value of their tangential velocity.

III. Axial rotation, by its very definition,
must always show multitudes of tangential velocities,
at various latitudes, simultaneously. And since any observer,
at any latitude of any rotating object, can have, at any time,
no more than one tangential velocity, the motion of any observer,
at any latitude of any rotating object, cannot, even in principle,
cause or make external objects appear to do any sort of axial rotation.

And it follows, therefore, that Einstein's 1916 hypothesis about relative
axial rotation is, demonstrably, incorrect and, ultimately, false.

Ufonaut99
Ufonaut99

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

Hi AAF,

Well, springtime in Brisbane, swamped by a swarm of .... Butterflies
Could be worse things to be swarmed by
AAF: As far as Einstein's S_1 & S_2 are concerned, my arguments have been, so far, quite strong.

At 1am, S_1 is above the NORTH pole (along the axis of rotation), so our observer in Oslo has to face NORTH to see it - directly in line with Lillehammer.

Your argument is that by 1pm (half a revolution), despite S_1 STILL being above the NORTH pole (along the axis of rotation), our observer has to face due SOUTH to see it over Gothemburg (along the red line).

And you consider that argument "quite strong" ????? Seriously, when was the last time you had to face AWAY from an object in order to see it ?

And you think all you have to do is shout "Parallax" to justify it ??? Sorry, but Parallax is well understood, and it does not mean you get to invent whatever magic light show you happen to want <img alt="Finger-wagging" width="51" height="45" src="http://www.sherv.net/cm/emoticons/hand- ... oticon.gif">

AAF
AAF

It has been one hundred years since the publication of Einstein's general theory of relativity in May 1916. In a paper recently published in EPJ Plus, Norwegian physicist Øyvind Grøn from the Oslo and Akershus University College of Applied Sciences and his co-author Torkild Jemterud demonstrate that the rotational motion in the universe is also subject to the theory of relativity. Imagine a person at the North pole who doesn't believe the Earth rotates. As she holds a pendulum and can observe the stars in her telescope, she remarks that the swinging plane of the pendulum and the stars rotate together. Newton, who saw the world as a classical physicist, would have pointed out that it is the Earth that rotates. However, if we assume the general principle of relativity is valid, the Earth can be considered as being at rest while the swinging plane of the pendulum and the night sky are rotating. In fact, the rotating mass of the observable part of the universe causes the river of space--which is made up of free particles following the universe's expansion--to rotate together with the stars in the sky. And the swinging plane of the pendulum moves together with the river of space.

https://www.sciencedaily.com/releases/2 ... 120254.htm

Hi, Ufonaut99:

YEP . . .

That is a fair price to pay for living in or too close
to the Tropics:

http://nationalgeographic.org/encyclopedia/tropics/

….....................................................................................................................................................................

"To date, your only reply has been: "AAF: Why is that? Because Einstein's S_1 is high in the sky!" To suggest that that S_1 disk would ever
swing behind the camera (needing the camera to rotate) if only it was high enough is ridiculous. ..."

I told you, once before, that 'high in the sky'
is, by no means, ridiculous!

And I don't see, this time around, any new and good reason
why you think it's ridiculous; and therefore, it is still
NOT ridiculous.

As a matter of fact, being 'high in the sky' is the basic condition
for making the apparent orbital circle of an external object clearly visible,
and preventing, at the same time, that same circle from being superimposed
upon the horizon circle of the observer.

And that is all!