Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: jeffreyH on 03/02/2015 21:17:16

Title: Can the slinky tell us anything about waves and gravity?
Post by: jeffreyH on 03/02/2015 21:17:16
I was thinking about the slow motion slinky drop and gravity recently. I was wondering if anything could be learned from this about how waves might behave in a gravitational field. Any thought?
Title: Re: Can the slinky tell us anything about waves and gravity?
Post by: JohnDuffield on 03/02/2015 21:45:35
I don't know if a slinky can tell you anything Jeffrey. You might be better off reading up on what Einstein said. In a nutshell it was this:

A concentration of energy in the guise of the matter of a star "conditions" the surrounding space altering its metrical properties, this effect diminishing with distance. Because of this the speed of light is spatially variable, and light waves moving through this space curve downwards. They kind of "veer" like a car veers when it encounters mud at the side of the road. 

See Einstein's Leyden Address ( for a reference:

"According to this theory the metrical qualities of the continuum of space-time differ in the environment of different points of space-time, and are partly conditioned by the matter existing outside of the territory under consideration. This space-time variability of the reciprocal relations of the standards of space and time, or, perhaps, the recognition of the fact that "empty space" in its physical relation is neither homogeneous nor isotropic, compelling us to describe its state by ten functions (the gravitation potentials gmn), has, I think, finally disposed of the view that space is physically empty."

Also see this from the Einstein digital archive:


IMHO it isn't totally different to sonar (


Title: Re: Can the slinky tell us anything about waves and gravity?
Post by: jccc on 03/02/2015 23:22:46
Gravity is the by product of electrostatic force (combined forces between all charges within two bodies). Space carries charged medium. The charged medium is denser near the gravity source. That's why light bend by gravity.

The charged medium is EM wave carrier. Some called it either.

The negative charged medium attracted by proton, form a ball of negative force field to protect the electron getting too close to the nucleus. All electrons attracted by nucleus positive force field, gravity thus exist.

Just my view. Drug for thought.