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Physics, Astronomy & Cosmology / Re: How does gravity affect a caesium clock?

« on: Yesterday at 18:55:59 »

This would be a useful review page for any sane enquirers.
https://www.doitpoms.ac.uk/tlplib/dielectrics/dielectric_refractive_index.php

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Physics, Astronomy & Cosmology / Re: How does gravity affect a caesium clock?

« on: Yesterday at 18:45:17 »

any medium through which the light is traveling is also in motion.

This theory was put to bed over a century ago.

Shhhh! Don't wake it up!
See: https://en.wikipedia.org/wiki/Michelson%E2%80%93Morley_experiment

I guess you are alluding to that ether nonsense. That is why the vacuum bit was important. And yes I know I have invited every ether nut to jump into this thread. Let's see what happens ...

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Physics, Astronomy & Cosmology / Re: Is there a speed of propagation of energy?

« on: 24/06/2019 22:30:40 »

Light is defined by the properties of wavelength and frequency. These are variable. What is not variable is the speed of light in a vacuum.

Frequency and wavelength define the energy of the photon. Wavelength times frequency equals c. Planck's constant times frequency gives the energy of the photon.

So the propagation speed for this energy is c, in a vacuum. Other media have refractive index that determine the speed of the photon.

Kinetic energy for other particle types have the magnitude of the velocity of the particle as a "propagation" speed. Although the full energy of the system includes the rest energy of the particle.

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Physics, Astronomy & Cosmology / Re: Can we derive a conic potential

« on: 24/06/2019 20:04:21 »

I found an interesting article on the gravitational fields of conical masses. I don't know it's veracity.
https://www.hindawi.com/journals/jgrav/2013/546913/

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Physics, Astronomy & Cosmology / Can entangled photons unlock a black hole?

« on: 24/06/2019 19:30:02 »

OK, a bit of a tabloid headline title. On to the crux. If we continually entangled photon pairs, sending one into a black hole and the other to a detector, would we be solving the information paradox? Or just wasting our time?

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Physics, Astronomy & Cosmology / Re: Is "Space" distinct from "nothingness"? (and the Vacuum)

« on: 24/06/2019 19:16:38 »

Vacuum energy may well be the confusing factor here. It relates to the fields that permeate all of space. A bit of light reading may help. https://en.m.wikipedia.org/wiki/Vacuum_energy

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Physics, Astronomy & Cosmology / Re: Is "Space" distinct from "nothingness"? (and the Vacuum)

« on: 24/06/2019 19:06:26 »

@Colin2B I think you forgot the link to the article on duck a l'orange.

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Physics, Astronomy & Cosmology / Re: How does gravity affect a caesium clock?

« on: 24/06/2019 18:48:17 »

What about when the mirrors are moving along the L axis?

In a frame where the mirrors move along the L axis, the time to go from mirror A to mirror B is different than going the other way.  In one case, light is trying to catch up to a receding mirror, and in the other, far less time is needed as the two are approaching from opposite directions.
The distance L is also contracted.  These effect couple together and the net result is the exact same dilation measured as a clock orientated a different way.

I go less for the length contraction and rather for the fact that any medium through which the light is traveling is also in motion. This will have a directional effect upon the light.

Of course if the moving object contained a vacuum then we are unable to rely upon a medium to explain the constancy of the speed of light.

That is the interesting part.

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Physics, Astronomy & Cosmology / Can we derive a conic potential

« on: 23/06/2019 19:10:52 »

If the gravitational field were not inverse square in nature, but had the same potential at every point, would this plot as a cone? I have been thinking about light cones. Which is why I am asking such a strange question.

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Physics, Astronomy & Cosmology / Re: How does gravity affect a caesium clock?

« on: 23/06/2019 18:59:18 »

I have a question. Please refer to this Wikipedia page  https://en.m.wikipedia.org/wiki/Time_dilation and the section Simple inference of velocity time dilation. The diagram there shows the situation where the mirrors are moving to the right. What about when the mirrors are moving along the L axis?

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New Theories / Re: New Theories: Will all moving objects with mass generate gravitational waves?

« on: 23/06/2019 18:33:20 »

All points in a gravitational field have a gravitational potential associated with them. This is not energy and the units for this potential are J/kg (joules per kilogram). The unit for energy is just the Joule. This is the same as the unit for work.

So the potential represents the amount of work required to get an object to a particular point in the gravitational field. This is why it is stated that an object gains potential energy by being moved to the point in the field. That is raised off the ground for instance.

This is an important distinction to remember .

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Physics, Astronomy & Cosmology / Re: What is the weight of a Field Line?

« on: 23/06/2019 14:58:24 »

What if the graviton does not contribute to the gravitational field? A gravitational wave does not necessarily move an object towards the source of the wave but only temporarily perturbs spacetime. Therefore, it could be argued that gravity does not beget gravity.

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Physics, Astronomy & Cosmology / Re: How does gravity affect a caesium clock?

« on: 23/06/2019 10:13:26 »

A video explaining this may be useful with a very ingenious device.

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New Theories / Re: How will buckyballs fired at a double slit behave?

« on: 23/06/2019 03:45:49 »

Now if Joe was here he would realise that vibrating strings cause waves. Sound waves. These are physical in the sense that they affect the air molecules. Propagating through this medium.

Not at all like matter waves.

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Physics, Astronomy & Cosmology / Re: Where were the electrons before the big bang?

« on: 22/06/2019 19:20:51 »

Thus when the "quark soup" was in sway, the electromagnetic force had yet to come into existence as a singular force, so the entity we now call the electron wasn't possible.

That is the best response I have heard yet.

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Physics, Astronomy & Cosmology / Where were the electrons before the big bang?

« on: 22/06/2019 14:24:26 »

I read a lot about quark gluon plasma as a source of the big bang but never about what state electrons were in at the big bang event. Can someone enlighten me?

Please see: https://en.m.wikipedia.org/wiki/Leptogenesis_(physics)

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Physics, Astronomy & Cosmology / Re: Is "Space" distinct from "nothingness"? (and the Vacuum)

« on: 22/06/2019 14:10:11 »

Let's think about the vacuum. Before the big bang everything was densely packed. Not even particles, as we understand them, existed. You still had energy. What about the vacuum in this scenario?

When energy is that dense then it must flood the vacuum. There is no zero point energy. Then we have the big bang and a continuous drop in energy density. Whereas we hold that the big bang emerged out of the vacuum shouldn't it be the other way round?

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New Theories / Re: How will buckyballs fired at a double slit behave?

« on: 22/06/2019 13:39:50 »

Not forgetting the guitar solo.
https://onpracticingguitar.chrisbottaguitar.com/2015/05/jimi-hendrix-hey-joe-solo-analysis.html

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New Theories / Re: How will buckyballs fired at a double slit behave?

« on: 22/06/2019 13:06:22 »

Hey Joe, where you goin' with that brick in your hand?

Da da da da daaaa

Hey Joe, I said where you goin' with that brick in your hand?
Alright.
I'm goin down to shoot my old theory
You know I caught it messin' 'round with another theorist.
I'm goin' down to shoot my old theory
You know I caught it messin' 'round with another man.

Da da da da, da da da da, da da da da, da da da da, da da, de da de da daaa

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Physics, Astronomy & Cosmology / Re: Where does energy come from?

« on: 21/06/2019 21:01:03 »

Energy is the mathematical concept used to model how the universe works. It comes in a variety of forms. The fact that energy is conserved can be initially derived from  Newton's laws of motion and inertia. Add in quantum mechanics and general relativity and you have a comprehensive way of modeling the world and the whole universe.

Studying the forms of energy and potential energy is a fascinating subject with some tough concepts underpinning it. Worth the effort in my opinion.