Thanks Andrew
This is exactly what happens when a photon for a short time follows a
(1x1) orbit. The optimal coupling happens if the polarization is 90/180
degrees depending on what effect you like. Photons basically have 1x1
orbits with a varying angle.
This photon coupling is also
Harry,
I'm glad that people are reexamining models of the motion of trapped
"bodies" on the surface of a "sphere".
Your comment about the varying weight density of the stone may touch on the
explanation of the Goos-Hanchen and Imbert-Federov effects on total
internal reflection at the optical
Andrew,
Andrew,
This is amazing. I have been pondering what puts the curl into a curling
stone for over 15 years and this week my intuition has been bolstered by
letting the entire surface of a planet be a curling rink and reading about
the work of Eötvös. The physics of curling is a
Harry,
You are touching on an important area that I am also contemplating. Your
frictionless, smooth, planet provides a constraint to the motion of a disk
on its surface. It is a real (physical) constraint, independent of frame of
reference and disk velocity. What about the nuclear hard core or
On Wed, Jan 22, 2020 at 5:40 PM Jürg Wyttenbach wrote:
> Unluckily the earth is not flat even in the curved sense as it is an
> ellipsoid with at least a delta north-south/east-west in radius of about
> 10km.
>
> Even more unluckily gravitation is not a constant it slightly depends on
> the
I don`t think it matters if the planet is rotating since the surface is
frictionless.
Of course measuring a change of weight in the real world that is
exclusively due to the rotation of earth is complicated by many variables.
The link you provided on the reactive centrifugal force could be one
Speaking of unusual thought experiments involving centripetal force, later
found to be real products - here is a surprising old electrical device which
explores the intersection of charge and mechanical spin.
https://www.youtube.com/watch?v=h3EpyjATE48
It is a rotating anode tube (valve to
Harry,
For your ice covered planet, you may need to indicate if it is rotating or
not and then, depending on your frame of reference, address Coriolis
forces.
This link addresses the weight at poles vs that at the equator.
On Wed, Jan 22, 2020 at 4:46 PM H LV wrote:
>
>
> On Mon, Jan 13, 2020 at 12:21 PM H LV wrote:
>
>>
>>
>> On Mon, Jan 13, 2020 at 10:15 AM H LV wrote:
>>
>>> This is an illustration from Newton's Principia of his famous cannon
>>> thought experiment. It shows how a cannonball fired
Unluckily the earth is not flat even in the curved sense as it is an
ellipsoid with at least a delta north-south/east-west in radius of about
10km.
Even more unluckily gravitation is not a constant it slightly depends on
the density of matter. And last but not least gravity is a force and not
On Mon, Jan 13, 2020 at 12:21 PM H LV wrote:
>
>
> On Mon, Jan 13, 2020 at 10:15 AM H LV wrote:
>
>> This is an illustration from Newton's Principia of his famous cannon
>> thought experiment. It shows how a cannonball fired horizontally from a
>> mountain top (assuming no air resistance) will
On Mon, Jan 13, 2020 at 10:15 AM H LV wrote:
> This is an illustration from Newton's Principia of his famous cannon
> thought experiment. It shows how a cannonball fired horizontally from a
> mountain top (assuming no air resistance) will orbit the Earth without
> falling to the ground if it is
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