loucal wrote:
… Relativity theory RT states that light is 'massless'.
TUB states in Paper 15.6, "; it demonstrates that light has weight. Light is a real substance,...".
Hi Louis.
Whether or not photons have mass, is purely a matter of semantic convension or interpretation of relativity theory. You can interpret E=mc^2 to mean energy is equivalent to mass (except for a conversion factor equal to the square of the speed of light); and a photon has momentum and momentum is related to mass (p = mv); and light is affected by gravity as demonstrated by gravitational lensing and other effects. Thus, a photon has (relativistic) mass.
Another way to use Einstein's equation is to keep mass and energy separate and only apply it when mass is converted into energy or energy is converted into mass as in nuclear reactions. This is a kind of compromise where mass is invariant and always has energy (so total energy is conserved). In this view kinetic energy and radiation and light do not have mass.
It is basically a matter of 'taste' whether or not you think photons have mass or only energy. Energy and mass are two ways of describing the same thing. TUB states that photons are real and have weight. So be it. But this is not incompatible with relativity theory.
loucal wrote:
… RT states that as a mass is accelerated to light speed, the mass increases toward infinity!
So, according to RT, light that travels at light speed is either massless or of infinite mass if TUB is correct about light having mass (weight). …
Well, obviously photons travel at the speed of light. And RT (obviously) does not state that the mass of a photon (or any massive particle accelerated to light speed) increases toward infinity. It only increases by a factor 1/sqrt(1-v^2/c^2). So, even at the speed of light the mass of a photon may be very, very minute. This is not disputed anywhere in TUB.
loucal wrote:
… RT states that light speed is the absolute speed limit of the universe. If this is true then every author of every paper in TUB is in violation of the universal speed limit! …
RT states that the speed of light is the speed limit of any massive particle or object. I think our physical notion of mass may not apply to the authors of TUB or even morontia reality. As far as we can observe, RT may only apply to what we human mortals perceive as matter. So, again, I don’t see any incompatibility with TUB.
loucal wrote:
General RT states that mass distorts the space around it creating 'gravity wells' to explain gravity.
I don’t see how this is incompatible with TUB. Again, RT is just a (very accurate) mathematical theory or model of reality. It is not reality itself!
loucal wrote:
TUB states that gravity is the sole control of energy-matter. This is the inverse of what RT contends in that RT says it is mass that distorts the space-time and thus gives us gravity. These two statements are wholely incompatible. Furthermore, TUB states that mass itself contains space and carries it space with it. If, as RT asserts, mass distorts space, then mass would distort itself, having space as part of its constituents.
Again, I don’t see a problem. Mass distorts space-time thus producing gravity which controls mass, which distorts space-time, et cetera. And remember that TUB states that ultimately everything is one. Possibly a Grand Unified Theory (not RT) will unambiguously solve this…
loucal wrote:
I see RT not as 'self-explanator'y but rather as glaringly 'self-contradictory'.
As I said, RT is what it is: a mathematical model or metaphor of physical reality that works; no more no less. That’s what I mean by RT is 'self-explanatory'. I don't see how RT is 'self-contradictory'.
loucal wrote:
The notion of Paradise itself is contradictory to RT. Einstein himself never envisioned a rotating universe. In fact, his only absolute was the constancy of the speed of light. I can hardly see anybody worshipping light!
The notion of Paradise doesn’t imply a rotating universe. And the assumption of a constant speed of light seems to work very well in physics. And TUB doesn’t dispute the constancy of the speed of light.
loucal wrote:
Us Urantians know God to be the only constant and his eternal abode, Paradise, to be absolutely stationary, serving as the only reference for motion. Both are Absolutes, why should motion be any different.
According to TUB God is unchanging and God is all, including all (relative) motion. So, God must be dynamic in some sense; like photons (and ultimatons) may be unchanging but very dynamic (massive) particles.
The First Source and Center is the absolute source of every (relatively moving) thing, and the ultimaton has Paradise as its nucleus. And paradise is stationary.. I’m still puzzled by these TUB statements. I suspect we need some radically different (outside-in and/or inside-out) perspective to make sense of it. But anyway, I don’t see how such TUB statements present any problem for RT..