Thinking about overlapping energy density environments energizing incoming radiation; Photons of low frequency, long wave length in low energy density space encounter high energy density space and the two energy environments merge. What happens to the radiation spears moving through these environments?

The speed of light is constant within a constant (consistent) energy density environment.

A light spear contained within an expanding energy density environment will experience a reduction in frequency and an increase in wave length .

The same light spear traveling from one energy density to another will experience a change in frequency (and wave length).

Radiation spears in a low energy density environment, when exposed to a high energy density environment will increase their frequency and decrease their wave lengths.

Does this sound right?

I know these changes have been attributed to the Doppler Effect and the relative motion of the observer. The frequency changes I am describing are not Doppler Effect, they are due to the physical expansion of the space containing the radiation spear. They are not Doppler, what are they called ?

Are you wondering what energy density environments are or can you work with the concept that all space contains energy, and that energy is at a particular energy density in a give space?

Are you wondering about expanding energy density environments or can you work with the concept that energy density in space is always expanding and that it becomes less dense as it expands?

Are you wondering what a radiation spear is (i.e. a sphere of spears ) or is it self explanatory?

I post in various forums here about my personal view of cosmology that I call the Infinite Spongy Universe (ISU). Accept for a few who may be familiar with my posts, you may not know that I consider there to be a “before and beyond” the big bang, and that I don’t consider General Relativity to be completely correct. Of course if I don’t adhere to the big bang as the start of space-time then that alone violates GR, so there you are.

I want to elaborate on my question in the OP that addresses the affect of inflation on the wavelength of electromagnetic radiation.

I think of EM as an expanding sphere of photons (say from a super nova). I use the term “spear of radiation” to mean the portion of a radiation sphere that reaches an observer, i.e. only a fine thin beam of radiation reaches the eye of the observer.

I also consider space to contain energy. I’m not talking about the energy that composes matter or any matter related energy, but I am talking about the concept that no empty space exists because energy occupies all space. I know that this concept alone is fertile ground for discussion, but for the question I want to pose I would ask that you try to work with the concept of energy density in space. A Google of the term gives millions of links so it is not a new concept.

If you can work with the concept of energy density in space, then you may see how I would consider energy density environments to be always expanding like our universe is an expanding energy density environment. It follows too that energy density in space becomes less dense as it expands.

Electromagnetic radiation (EMR) contained within an expanding energy density environment will experience a reduction in frequency and an increase in wave length due to inflation.

I know these changes in frequency, i.e. the red shift for example can be attributed to the Doppler Effect and the relative motion of the observer. The frequency changes I am describing are not Doppler Effect; they are due to the physical expansion of the space containing the radiation sphere and not the momentum of the wave relative to an observer. My question is if this reduction in frequency is not Doppler Effect, what is it called? Is there a name for the effect that I am describing; maybe the Inflation Effect or something? If so I would like to know so I can Google it.

Now getting to my second question, I am thinking about two overlapping energy density environments; huge environments that might equate to our expanding universe running into a similar adjacent expanding universe, both being part of a greater (infinite) universe. Each of the two expanding energy density environments (the two similar known universes) might have different energy densities because they could be in different stages of their expansions.

Given that scenario, each of the two environments would contain electromagnetic radiation (EMR) spheres that have experienced long periods of expansion (inflation).


In the scenario of two known universal size environments meeting and merging (overlapping), would photons of low frequency in the radiation spheres of the low energy density environment experience an increase in frequency and a shorter wave length as a result of the merger of the low energy density environment with the high energy density environment?

I am sorry for such a complicated question and hope it is not entirely too speculative to get any consideration.

OK, maybe what I am talking about IS the Doppler Effect.

If inflation is occurring consistently across the observable universe, then every observation point is moving away from every other point, and the rate of that movement is accelerating.

So if there was a supernova at a distant location at a point in time, the very fact that we are moving away from it would cause a red shift; commonly understood by most people I would think.

My question tried to separate the red shift into two components. That component due to relative movement of the event, i.e. the supernova, and my observation point, and that component of the stretching of the wavelength itself as the space that contained the spear of radiation expanded.

Because of the lack of response, I’m rethinking it and am beginning to think that there is only one component, i.e. the effect of inflation causing the Doppler Effect.

The second part of my question then reflects the opposite effect, a compressing of the wavelength.

What is a "radiation spear"?

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PW -- Plant Whisperer

I think of EM as an expanding sphere of photons (say from a super nova). I use the term “spear of radiation” to mean the portion of a radiation sphere that reaches an observer, i.e. only a fine thin beam of electromagnetic radiation reaches the eye of the observer.

A light spear has a finite length based on the duration of the electromagnetic radiation that caused it. It is sometimes used in discussions of Olbers' Paradox as an example of the finite EM from stars because they have a finite life time, thus partially explaining why the night sky is dark. As a light spear passed, that point in the sky went dark.

No.

It is meaningless to talk about radiation "exposed to a high energy density environment." You can only talk about receivers and emitters. If the receiver is moving relative to emitter, light will be doppler-shifted; if the receiver is in a high-density environment relative to the emitter, then the receiver will observe a gravitaional-shift in frequency.

Light is either emitted or received. Speculating about what happens to light "in between" has no meaning.

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PW -- Plant Whisperer

Interesting answer. Can you elaborate on the "gravitational shift in frequency"?

And a second question, is that a "blue shift" when going from low to high energy density?

If you fire a bullet straight up, it will lose velocity. Likewise, after the bullet reaches its highest point and starts falling down, it will gain velocity.

Since the velocity of light is constant, it cannot lose or gain velocity. But if you fire a laser beam straight up, the photons will "lose frequency" (i.e. red-shift) instead of losing velocity. Likewise, if you were in space and fired a laser beam straight down, the photons would "gain frequency" (blue-shft) rather than gain velocity. Hence the "gravitational shift in frequency."

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PW -- Plant Whisperer

Thank you. That makes sense.

Correct me if I misunderstand, but whether it is a red shift or a blue shift then, the correlation between gravitational frequency and Doppler Effect is striking wouldn't you say?

The red shift occurs when an emitter and an observer are moving away from each other? The blue shift occurs when an emitter and an observer are moving toward each other.

The gravitational shift results in a red shift if the light spear is pointed away, and in a blue shift if the light spear is pointed toward a fixed object. It is directional.

With both the Doppler Effect and the gravitational effect, the speed of the light being observed is always the same, but the frequency is subject to change based on momentum of the observer relative to the emitter or at least based on momentum of the observer relative to the direction that the light is being emitted?

That said, one observer could observe a red shift from a distant object, while another observer could see a blue shift in the light emitted by that same object. Of couse not in our universe for all practicle purposes since the expansion is occuring everywhere.