When a science fiction writer starts pondering the basics of science, especially outside the confines of a story or novel, the results can be ugly. But…there’s this question, and a lot of them that arise from it, or cluster around it… or something.
Does light really maintain a constant speed in a vacuum and away from massive gravitational forces?
Most people, I’m afraid, would respond by asking, “Does it matter?” or “Who cares?”
Physicists generally insist that it does, and most physics discussions deal with the issue by saying that photons behave as if they have zero mass at rest [and if I’m oversimplifying grossly, I’m certain some physicist will correct me], which allows photons to travel universally and generally invariably [again in a vacuum, etc.] at the speed of light, which is a tautology, if one thinks about it. Of course, this is also theoretical, because so far as I can determine, no one has ever been able to observe a photon “at rest.”
BUT… here’s the rub, as far as I’m concerned. Photons are/carry energy. There’s no doubt about that. The earth is warmed by the photonic flow we call sunlight. Lasers produce coherent photonic flow strong enough to cut metal or perform delicate eye surgery.
Second, if current evidence is being interpreted correctly, black holes are massive enough to stop the flow of light. Now… if photons have no mass, how could that happen, since the current interpretation is that the massive gravitational force stops the emission of light, suggesting that photons do have mass, if only an infinitesimal and currently unmeasurable mass.
These lead to another disturbing [at least for me] question. Why isn’t the universe “running down”? Don’t jump on me yet. A great number of noted astronomers have asserted that such is indeed happening – but they’re talking about that on the macro level, that is, the entropy of energy and matter that will eventually lead to a universe where matter and energy are all at the same level everywhere, without all those nice gradients that make up comparative vacuum and stars and planets and hot and cold. I’m thinking about winding down on the level of quarks and leptons, so to speak.
Current quantum mechanics seems to indicate that what we think of as “matter” is really a form of structured energy, and those various structures determine the physical and chemical properties of elements and more complex forms of matter. And that leads to my problem. Every form of energy that human beings use and operate “runs down” unless it is replenished with more energy from an outside source.
Yet the universe has been in existence for something like fifteen billion years, and current scientific theory is tacitly assuming that all these quarks and leptons – and photons – have the same innate internal energy levels today as they did fifteen billion years ago.
The scientific quest for a “theory of everything” tacitly assumes, as several noted scientists have already observed, unchanging universal scientific principles, such as an unvarying weak force on the leptonic level and a constant speed of light over time. On a practical basis, I have to question that. Nothing seems to stay exactly the same in the small part of the universe which I inhabit, but am I merely generalizing on the basis of my observations and anecdotal experience?
All that leads to the last question. If those internal energies of quarks and leptons and photons are all declining at the same rate, how would we even know? Could it be that those “incredible speeds” at which distant galaxies appear to be moving are more an artifact of changes in the speed of light? Or in the infinitesimal decline of the very energy levels of all quarks, etc., in our universe?
Could our universe be running down from the inside out without our even knowing it?